Answer:
Option C is correct. The active site of an enzyme is a specific region that is complementary to a specific substrate molecule. This means that the active site has a specific shape that only fits with the shape of a particular substrate molecule. Once the substrate molecule binds to the active site, the enzyme can catalyze the reaction to form the product(s).
I need help, please
1. Identify the muscles involved in a bicep curl. Briefly note their role when they contract: who are the candidates for prime mover and who is a synergist (to who). Note any antagonists (to Who).
2. During an overambitious workout, Vanessa pulls some muscles by forcing her knee into extension when her hip is already fully flexed. a) What muscle group does she pull? b) What muscles make up that group? c) What group is antagonistic to this group?
3. a) Identify the hip flexor, deep in the pelvis, that is a composite of two muscles. b) What muscle is antagonistic to the hip flexor?
4. Identify the muscles that allow you to draw your legs to the midline of your body, as when standing at attention.
5. What is the wrist flexor that follows the radius?
6. What is the name of the muscles of the lateral leg that plantar flex and evert the foot?
The muscles involved in a bicep curl are the biceps brachii, brachialis, and brachioradialis. The biceps brachii acts as the prime mover, contracting to lift the weight and flex the elbow joint.
What is the role of brachialis and brachioradialis?The brachialis and brachioradialis act as synergists, assisting the biceps in flexing the elbow joint. The triceps brachii acts as an antagonist to the biceps, working to extend the elbow joint and resisting the flexion created by the biceps.
a) Vanessa pulls her hamstring muscles. b) The hamstring muscle group is made up of three muscles: the biceps femoris, semitendinosus, and semimembranosus. c) The quadriceps muscle group is antagonistic to the hamstring group, working to extend the knee joint and resisting the flexion created by the hamstrings.
a) The hip flexor deep in the pelvis that is a composite of two muscles is the iliopsoas. It is made up of the iliacus and psoas major muscles. b) The gluteus maximus muscle is antagonistic to the iliopsoas, working to extend the hip joint and resisting the flexion created by the iliopsoas.
The muscles that allow you to draw your legs to the midline of your body are the adductor muscles. These include the adductor longus, adductor brevis, adductor magnus, gracilis, and pectineus muscles.
The wrist flexor that follows the radius is the flexor carpi radialis muscle.
Thus, The muscles of the lateral leg that plantar flex and evert the foot are the peroneus longus and peroneus brevis muscles.
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How does the particle arrangement and movement change? How does the particles behave in a liquid and how that changes when it becomes a gas.
Answer:
The particles in a liquid are loosely packed and occupies and moves much more freely than particles in solids, and when liquid changes to gas the particles becomes even more free. The arrangement of particles in both gases is more loose and free than in solids. There is an irregular arrangement that allows for more movement between particles.
Which of the following would result in fraternal twins who don’t have identical DNA 
A) two sperms fertilizing two different eggs that are released in the same cycle
B) one sperm fertilizing, a single egg that splits into two embryos
C) two sperm fertilizing a single egg
D) one sperm fertilizing a single egg
The following would result in fraternal twins who don’t have identical DNA : A) Two sperms fertilizing two different eggs that are released in same cycle can result in fraternal twins who don’t have identical DNA.
What are fraternal twins?Fraternal twins are also known as dizygotic twins. It occurs when two eggs are released during the same ovulation cycle and are fertilized by two different sperm. Each zygote will have its own unique genetic material, resulting in fraternal twins who are not identical and may have different physical characteristics and traits.
Option B describes the process of identical twins, where single fertilized egg splits into two embryos, resulting in two individuals with same DNA.
Option C is not possible as single egg can only be fertilized by one sperm.
Option D describes the normal process of conception and will result in single individual with its own unique genetic material.
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Please help
1. Describe specific anatomical characteristics for typical cervical, thoracic, and lumbar vertebrae
2. Describe the structure of an osteon.
1.) Specific anatomical characteristics of typical cervical, thoracic, and lumbar vertebrae:
- Cervical vertebrae: There are seven cervical vertebrae in the human spine, located in the neck region. They are smaller and more delicate than the thoracic and lumbar vertebrae. Cervical vertebrae have a bifid (split) spinous process and transverse foramina, which allow passage of the vertebral arteries and veins that supply blood to the brain. They also have small, oval-shaped vertebral bodies and relatively large vertebral arches.
- Thoracic vertebrae: There are twelve thoracic vertebrae in the human spine, located in the upper back region. They are larger and more robust than the cervical vertebrae. Thoracic vertebrae have long, downward-pointing spinous processes and costal facets for articulation with the ribs. They also have heart-shaped vertebral bodies that are larger than those of the cervical vertebrae, but smaller than those of the lumbar vertebrae.
- Lumbar vertebrae: There are five lumbar vertebrae in the human spine, located in the lower back region. They are the largest and strongest of the vertebrae. Lumbar vertebrae have short, thick spinous processes and large, kidney-shaped vertebral bodies. They also have broad, flat transverse processes and no costal facets, as they do not articulate with the ribs.
2.) Structure of an osteon:
An osteon (also called a Haversian system) is a cylindrical unit of compact bone tissue that forms the basic structural and functional unit of bone. It consists of concentric layers of bone tissue called lamellae, which are arranged around a central canal called the Haversian canal. The Haversian canal contains blood vessels and nerves that supply nutrients and oxygen to the bone cells (osteocytes) and remove waste products. The osteocytes are located in small spaces called lacunae, which are connected by tiny channels called canaliculi. The canaliculi allow the osteocytes to exchange nutrients and waste products with each other and with the blood vessels in the Haversian canal. The osteons are interconnected by perforating canals called Volkmann's canals, which allow blood vessels and nerves to penetrate the bone tissue and connect adjacent osteons. Together, the osteons form a strong and flexible matrix that gives bone its characteristic strength and resilience.
if enough individuals in a popularization have effective adaptions and survive what happens to the population.
if enough individuals in a popularization have effective adaptions and survive whole may undergo a process of natural selection.
What is natural selection?Natural selection is a mechanism of evolution that favors individuals with traits that increase their likelihood of survival and reproduction. As a result, these individuals are more likely to pass on their advantageous traits to their offspring, and over time, these traits can become more common in the population.
If a population hasthat allow its members to survive better in their environment, then those members are more likely to reproduce and pass on their genes to the next generation. Over time, the frequency of these advantageous traits may increase in the population, while the frequency of less advantageous traits may decrease.
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The repolarization of the atria is not indicated on an electrocardiogram because the repolarization is hidden by the T wave of the ventricles.
True
False
It is accurate to say that the repolarization of the atria is not visible on an ECG because the T wave of the ventricles obscures it.
How come atrial repolarization is obscured?The wave of atrial repolarization is of little amplitude, undetectable. A typical P wave has a maximum height of 2.5 mm (two and a half 1-mm divisions) and a maximum width of 120 ms (three 1-mm divisions) in any lead.
Where in the ECG is atrial repolarization concealed?Abbreviations. The electrocardiographic (ECG) deflection brought on by atrial depolarization is minimal in both amplitude and area when compared to the QRS complex. The subsequent QRS complex frequently obscures atrial repolarization.
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4. Earth's rock layers include the upper mantle, the lower mantle, the crust, and the Moho.
A. Create a diagram that labels each of the four layers listed above. (4 points)
B. What is one characteristic of each layer? (4 points)
part a. The diagram showing the upper mantle, the lower mantle, the crust, and the Moho is attached.
part b.
The characteristics include:
for the Crust:
The crust is relatively thin compared to the other layers.for the Lower Mantle:
It is located below the upper mantle.for the Moho :
It marks the boundary between the crust and the mantle.for the upper Mantle:
It Lies beneath the crust.What are the rock's layers?The science of strata, stratigraphy, deals with all of the features of layered rocks and includes the study of how these rocks connect to time. Rock layers are also known as strata (the plural version of the Latin word stratum.
The rock layers in order are : Cambrian, Ordovician, Silurian, Devonian, Carboniferous, (Mississippian and Pennsylvanian), Permian, Triassic, Jurassic, Cretaceous, Tertiary, and Quaternary.
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2. In peas, gray seed color is dominant to white. In the following experiments, parents
with known phenotypes but unknown genotypes produced the listed progeny
Parents.
a. gray x white
b. gray x gray
c. white x white
d. gray x white
e. gray x gray
Gray
82
118
0
74
90
Progeny
White
78
39
50
0
o
Using the letter G for the gray gene and g for white, give the most probable genotype
of each parent.
The most probable genotype of each parent will be:Parent 1: Gg × ggParent 2: Gg × GgParent 3: gg × ggParent 4: Gg × ggParent 5: Gg × Gg
As per the given scenario, in peas, gray seed color is dominant to white. In the experiments listed, the parents with known phenotypes but unknown genotypes produced the progeny given below. Parents:a. Gray x whiteb. Gray x grayc.
White x whited. Gray x whitee. Gray x grayThe progeny are given as below:Gray: 82, 118, 0, 74, 90White:
78, 39, 50, 0, oThe most probable genotype of each parent would be:
Parent 1 (a)If the gray seed color is dominant to white seed color, the gray parent could be homozygous dominant (GG) or heterozygous (Gg), and the white parent could be homozygous recessive (gg). Hence, the most probable genotype of gray would be Gg (heterozygous) and that of white would be gg (homozygous recessive).
Parent 2 (b)In case both parents are gray, we can assume that both parents are either homozygous dominant (GG) or heterozygous (Gg). Hence, the most probable genotype of both parents would be Gg (heterozygous).
Parent 3 (c)In case both parents are white, we can assume that both parents are homozygous recessive (gg). Hence, the most probable genotype of both parents would be gg (homozygous recessive).
Parent 4 (d)If the gray seed color is dominant to white seed color, the gray parent could be homozygous dominant (GG) or heterozygous (Gg), and the white parent could be homozygous recessive (gg).
Hence, the most probable genotype of the gray parent would be Gg (heterozygous) and that of the white parent would be gg (homozygous recessive).
Parent 5 (e)In case both parents are gray, we can assume that both parents are either homozygous dominant (GG) or heterozygous (Gg). Hence, the most probable genotype of both parents would be Gg (heterozygous).
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8. The climate and vegetation of Earth changed from the Mesozoic era to the Cenozoic era (current
day).
A. What are two ways the climate has changed since the Mesozoic? (6 points)
B. What is one way vegetation has changed since the Mesozoic? (3 points)
Answer:
A. Two ways the climate has changed since the Mesozoic are:
Cooling: The average temperature of Earth has decreased significantly since the Mesozoic era, particularly during the Cenozoic era. This cooling was caused by a decrease in atmospheric carbon dioxide levels, changes in ocean circulation patterns, and other factors.
Increased variability: The climate has become more variable and unpredictable since the Mesozoic era, with more frequent extreme weather events such as droughts, floods, and hurricanes. This may be due to changes in ocean and atmospheric circulation patterns, as well as human-induced climate change.
B. One way vegetation has changed since the Mesozoic is:
Evolution of flowering plants: During the Mesozoic era, the dominant plant species were gymnosperms such as conifers and ferns. However, during the Cenozoic era, flowering plants (angiosperms) became the dominant plant species. This change in vegetation may have been driven by the evolution of new pollination strategies and adaptations to changing climate conditions.
Explanation:
What is biology . Define it .
Answer: the study of living organisms, divided into many specialized fields that cover their morphology, physiology, anatomy, behavior, origin, and distribution.
Explanation: The simplest definition of Biology
Stefan says that asexual reproduction is always better for a species than
sexual reproduction. Is he correct? Why or why not?
Answer:
Stefan's statement that asexual reproduction is always better for a species than sexual reproduction is not entirely correct. Both asexual and sexual reproduction have advantages and disadvantages, and the choice between them depends on various factors.
Asexual reproduction can produce offspring quickly, and a single individual can produce many offspring. Asexual reproduction also allows for the reproduction of organisms in stable environments where there is little genetic diversity needed. However, asexual reproduction does not provide genetic diversity in the offspring, which can lead to a lack of adaptation to changing environments and increased vulnerability to diseases and parasites.
Sexual reproduction, on the other hand, produces offspring that have greater genetic diversity, which can increase the adaptability of a species to changing environments. Sexual reproduction also allows for the elimination of harmful mutations and the recombination of beneficial genes, which can increase the fitness of offspring. However, sexual reproduction requires two individuals and is slower than asexual reproduction.
Therefore, the choice between asexual and sexual reproduction depends on the environment, the species, and the circumstances. In some cases, asexual reproduction may be advantageous, while in others, sexual reproduction may be more beneficial for the survival and success of a species.
Explanation:
The graph shown repressnts the growthin cell number over time which lline would be used to represent cancer
Answer:
it would be the fastest increasing one as it grows very rapidly
Dogs pant because
A) Evaporation causes cooling
B) Evaporation gets rid of excess water in the body
C) It is tired
D) Panting helps to raise body temperature
Answer:
(A)
Explanation:
they pant because they are cooling there
self down
How could you investigate the lowest possible effective dose to use against a particular strain of bacteria
Stimulations were ran to examine the effects of changes in dosage distribution and antibiotic exposure frequency on community resistance patterns.
What are Antibiotics ?Antibiotics are antimicrobial substances that are active against microorganisms. Antibiotic drugs are widely utilized in the treatment and prevention of bacterial infections since they are the most significant form of antibacterial agent. They can either kill or hinder bacterial growth. A small proportion of antibiotics have antiprotozoal action. Antibiotics are ineffective against viruses such as the common cold or influenza; instead of antibiotics, medications that decrease virus growth are referred to as antiviral drugs or antivirals. They are also ineffective against fungi; antifungal medicines are those that hinder the growth of fungus.
What is Antibiotic resistance ?Antibiotics are antibiotics that are used to prevent and treat bacterial infections. Antibiotic resistance arises when bacteria adapt to the usage of these medications. Antibiotic resistance develops in bacteria rather than people or animals. These bacteria can infect humans and animals, and their infections are more difficult to treat than infections caused by non-resistant bacteria.
Antibiotic resistance raises medical expenses, lengthens hospital stays, and increases mortality.
The world urgently needs to modify the way antibiotics are prescribed and used. Even if new medications are found, antibiotic resistance will remain a big threat unless behavior changes. Changes in behavior must also include efforts to minimize the spread of illnesses such as immunization, hand washing, safer sex, and excellent food hygiene.
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If the rocket pushes forward with a force of 675 N, what is the recoil force upon you, the shooter?
When the rocket is fired, the shooter will feel a backward force of 675 N.
What is force?The interaction between two things that causes a change in motion for either one or both of the objects is referred to as exerting force. It is described as the pressure or pulling that one thing applies to another.
A force's magnitude, direction, and application point can all be used to define it.
How do you determine it?With every action, there is an equal and opposite response, states Newton's third rule of motion.
When a rocket is fired, the action is the forward force the rocket exerts, and the reaction is the force the shooter feels as the rocket recoils.
The recoil force experienced by the shooter will be 675 N if the rocket pushes forward with a force of 675 N. This indicates that when the rocket is fired, the shooter will feel a backward force of 675 N.
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If you are on a very low carb diet, what can your body break down and convert to glucose (that your brain needs for fuel)?
Explanation:
When on a very low carb diet, the body will break down and convert certain amino acids, such as alanine, glutamic acid, and aspartic acid, into glucose. This process is known as gluconeogenesis. The body can also convert certain fatty acids and glycerol from fat into glucose. This process is known as lipolysis. Both of these processes provide the glucose needed for the brain to function properly.
Armadillos give birth to identical quadruplets. A zoo with a healthy population of armadillos gives three to other zoos and retains the fourth. Researchers collect data on each armadillo and find that trait differences develop. What are the likely influences of genetic and environmental factors in these differences? (1 point)
Variations are largely due to genetic factors.
Variations are due to factors besides genetic or environmental.
Variations are largely due to environmental factors.
Variations are due to genetic and environmental factors.
Contrary to popular belief, which holds that genes are "cast in stone," research shows that initial encounters can affect how genes are activated and inactivated, as well as whether or whether they're expressed at all.
How do genes work?genetic material that is transferred from parent to kid. The chromosomes with in nucleus of cells have precise sites where genes are ordered sequentially on DNA sequences.
Which genes are examples?From one child to the next, our genes transmit information. The reason the child has white highlights resembling their mother and their sibling gets brown hair unlike their father, for instance, is genetic. Also, genes influence both the gender of newborns and why some diseases run in families.
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This model of the carbon cycle shows the continuous movement of carbon atoms between the biosphere, atmosphere, hydrosphere, and geosphere. Some processes store carbon while others release it. Deforestation, the clearing or thinning of forests by humans, has. significant impact on the carbon cycle. What is a likely consequence of deforestation?
Responses
Deforestation's main effects include the extinction of priceless wildlife and rare plant and animal species as a result of habitat loss, soil erosion, exacerbated floods and drought, pollution, and elevated levels of carbon dioxide.
What are the Class 9 effects of deforestation?The atmosphere and climate have been severely altered by deforestation. Moreover, it has caused soil erosion and desertification, increased greenhouse gas levels, and posed a threat to biodiversity and animal habitats.
What is Class 8 long answer for deforestation?Deforestation is the intentional clearing of wooded land. Throughout history and into the present, forests have been removed to make place for agriculture and animal grazing as well as to obtain wood for use in manufacturing, construction, and heating.
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Match the following terms and definitions.
1. aquatic, cylindrical animals with a fixed base
polyp
2. an animal with a false body cavity separating the mesoderm and endoderm
pseudocoelomate
3. condition in which many similar parts radiate from a central axis in an organism's body
radial symmetry
4. region of a mollusk's body that contains its internal organs
visceral mass
Polyps are cylindrical, aquatic organisms with a solid base. a pseudocoelomate is an animal with a false body cavity dividing the mesoderm and endoderm. Radial symmetry is the state where numerous similar parts in an organism's body radiate outward from a centre axis.
Which species are mesoderm-free?Animals in the phylum Cnidaria, which includes jellies, polyps, and hydras, are thought to be diploblastic, meaning they have two tissue layers. These are the ectoderm and endoderm tissues, which are divided by a jelly-like material called mesoglea. There is no mesoderm tissue in these animals.
What mammal has an artificial cavity between its mesoderm and endoderm?Animals known as pseudocoelomates have a fluid-filled body cavity that is not entirely sealed with mesoderm tissue. Pseudocoelom refers to the space between the mesoderm and the endoderm.
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Explain which cells,tissues,or organs should be modified to lead to successful photosynthesis in animals or humans discuss how these compare to a plants leaves
cell are basic unit of life
To successfully achieve photosynthesis in animals or humans, modifications must be made to their cells, tissues, or organs involved in energy production and metabolic processes. One approach that has been proposed involves genetically modifying chloroplasts (organelles responsible for photosynthesis in plants) to enable them to function in animal or human cells.
What is the significance of chloroplast?Chloroplasts are found in the leaves of plants and are responsible for converting light energy into chemical energy via photosynthesis. However, they are also found in other plant tissues, such as stems and roots, which play a role in energy production and storage.
What are muscle cells responsible for?Muscle cells are responsible for movement and require significant energy to function. If modified to include chloroplasts, muscle cells could produce energy via photosynthesis, reducing reliance on other energy sources such as glucose.
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how does dna fingerprinting work
Answer:
DNA fingerprinting uses chemicals to separate strands of DNA and reveal the unique parts of your genome.
Explanation:
hope it helps
If you infect the buffalo population with a disease how do you predict that will affect the buffalo population ?
It will decrease the population of Buffalo.
Without proper treatment, the Buffalo will die off. Resulting in less buffalo.
What is a drought treatment?
A drought treatment refers to a collection of actions or steps taken to lessen the effects of drought on a specific ecosystem, community, or crops.
What is drought treatment?A drought treatment refers to a set of actions or measures taken to mitigate the effects of drought on a particular ecosystem, community, or crop.
The goal of drought treatment is to minimize the negative impacts of water scarcity and help the affected system or population cope with reduced water availability.
Drought treatments can take different forms depending on the context and severity of the drought. Some common drought treatments include:
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Due to the way in which it regulates a variety of body functions, the ________ is a part of the brain that is often compared to a thermostat.
Mark has a friend name Chloe. How different are Marques and Chloee’s DNA
Answer:
completely different, 0.1% different.
Explanation:
in meiosis, the cell splits into 4 geneticly different daughter cells. The placement of the DNA is what makes them different.
I hope that
Which inference can best be made based on the
diagram?
(1) Adaptations for living in trees are inherited
by all primates.
(2) Humans and apes have a common ancestor.
(3) The embryos of monkeys and apes are
identical.
(4) The period of development is similar in most
primates.
Humans and apes have a common ancestor inference can best be made based on the diagram.
Option 2 is correct.
The graph shows the developmental connection between various primate species, including people and chimps, and demonstrates that they share a typical genealogy. Based on scientific evidence, this suggests that they evolved from a common ancestor.
How do adaptations work?Changes in an organism's characteristics, behavior, or physiology that make it better able to survive and reproduce in its environment are known as adaptations. These changes could be physical, like a polar bear's thick fur, which keeps it warm in its icy habitat, or behavioral, like a bird migrating to a warmer climate in the winter. Natural selection is the process by which organisms that are better adapted to their environment survive and pass on their traits to their offspring. Adaptations can be passed down from generation to generation and can be the result of natural selection.
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Which idea did Lamarck propose that was rejected by his fellow scientists?
Fossils show that behaviors of ancient species.
Organisms evolve by acquiring behaviors.
Acquired traits can be passed to offspring.
Giraffes have large gene pools than most animals.
Answer:
The idea proposed by Lamarck that was rejected by his fellow scientists is "Acquired traits can be passed to offspring."
Explanation:
Lamarck believed that organisms could pass on traits they acquired during their lifetime to their offspring, a theory known as the inheritance of acquired characteristics. However, this idea has been widely discredited by the scientific community since it does not align with the principles of genetics and heredity. The traits that are passed down to offspring are determined by genetic information passed on through the reproductive cells, not by the environment or lifestyle of the parent.
If a wave is traveling at a certain speed and the frequency is increased, what will happen to its wavelength?
Answer:
the wave length will decrease
Observing How Plates Move
How slowly do plates move? Use the Sim to measure how far plates move from each other over time
and use your measurements to calculate the rate of plate motion.
1. Open the Plate Motion Sim.
2.
Go to Region 2 of the Sim.
3.
Add a GPS marker to each plate as close as possible to each other and to the plate boundary.
4. Press SET BOUNDARY and select Divergent as the plate boundary type. Then press RUN.
5. During the run, press Pause approximately every 50 million years. Record the time in the first
column of the table below. Observe the distance between the two pins by pressing on either pin
and reading the distance to the other and then record that number in the Distance column. You
can press the Reset button in the top right corner to replay the Sim.
6. Calculate the rate for each pair of distances and times by dividing the distance by the time.
Record those numbers in the Rate column.
Fill out the data table below. using evidence from the Sim.
Time (millions of years)
Distance (km)
Rate (km per million years)
Answer: Current plate movement can be tracked directly by means of ground-based or space-based geodetic measurements; geodesy is the science of the size and shape of the Earth. Ground-based measurements are taken with conventional but very precise ground-surveying techniques, using laser-electronic instruments. Sep 15, 2014
Explanation: Earth's land masses move toward and away from each other at an average rate of about 1.5 centimeters (0.6 inches) a year. That's about the rate that human toenails grow!
Geodesy, the science of measuring the Earth's shape and positions on it, allows the measurement of plate motion directly using GPS, the Global Positioning System. This network of satellites is more stable than the Earth's surface, so when a whole continent moves somewhere at a few centimeters per year, GPS can tell.
Ichythyoisis hystrix gravier (a greatly thickened bumpy condition of the skin) is a rare human abnormality, but in the
families in which it occurs, it always occurs in males and is transmitted from the father to all of his sons. Unaffected
females never transmit the gene for this condition. What explanation can you suggest for this curious and unusual type of
inheritance. With punnet square
The pattern of inheritance described is consistent with X-linked recessive inheritance
Genetic inheritance explained.
The pattern of inheritance described is consistent with X-linked recessive inheritance. In this type of inheritance, the gene causing the condition is located on the X chromosome, one of the two sex chromosomes. Females have two X chromosomes, while males have one X chromosome and one Y chromosome.
If a female carries a recessive X-linked gene, she will be unaffected because she has a second X chromosome that can provide a normal copy of the gene. However, if a male inherits the recessive X-linked gene from his mother, he will express the condition because he does not have a second X chromosome to provide a normal copy of the gene. Therefore, the condition appears to skip generations and is only passed from affected fathers to their sons.
A Punnett square can be used to illustrate the inheritance of X-linked recessive traits. In this case, we would use a modified Punnett square that only shows the inheritance of the X chromosome. Let's assume that the gene causing chythyoisis hystrix gravier is represented by the recessive allele "x" on the X chromosome.
The Punnett square for a cross between an unaffected female (XX) and an affected male (XY) would look like this:
| X | X
--|-----|-----
Y | Xx | Xy
--|-----|-----
Y | Xx | Xy
In this case, all of the male offspring inherit an X chromosome with the recessive "x" allele from their father, resulting in the expression of the condition. None of the female offspring inherit the recessive allele from their father and are therefore unaffected carriers.
Note that X-linked recessive inheritance can also result in affected females if both of their X chromosomes carry the recessive allele. However, this is relatively rare because the chance of inheriting two copies of the recessive allele is low
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