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A colour blind man marries a woman with normal sight who has no history of colour blindness in her family. His son also marries a woman whose family has no history of color blindness. What is the probability of their grandson through the Son being colour blind?
- a)1
- b)0.25
- c)Nil
- d)0.5
Correct answer is option 'C'. Can you explain this answer?
Verified Answer
A colour blind man marries a woman with normal sight who has no histor...
(c) XX × XcY Normal women Colourblind man
The daughters of this couple will have normal eye sight and carrier if one of the carrier daughter marries with normal eyed man. XXc × XY Normal women Normal man
The daughters of this couple will have normal eye sight and carrier if one of the carrier daughter marries with normal eyed man. XXc × XY Normal women Normal man
Only 25% grandson will show colourblindness.
This question is part of UPSC exam. View all NEET courses
Most Upvoted Answer
A colour blind man marries a woman with normal sight who has no histor...
As the x chromosome of father goes to only daughter so no chance of son and grandson being colorblind
Community Answer
A colour blind man marries a woman with normal sight who has no histor...
The correct answer is option 'C', Nil (or 0).
Here's the explanation:
Explanation:
Color blindness:
Color blindness is a genetic condition that affects the perception of colors. It is more common in males because the genes responsible for color vision are located on the X chromosome. Since males have only one X chromosome, they are more likely to be affected by color blindness if they inherit the gene mutation.
Inheritance of color blindness:
Color blindness is typically inherited in an X-linked recessive pattern. This means that the gene mutation causing color blindness is located on the X chromosome. Females have two X chromosomes, so they can be carriers of the color blindness gene without being affected by the condition themselves. Males, on the other hand, have only one X chromosome, so if they inherit the gene mutation, they will be color blind.
Scenario:
In the given scenario, the father is color blind, but the mother has normal color vision and no history of color blindness in her family. This suggests that the mother is not a carrier of the color blindness gene.
Probability of the son being color blind:
Since the father is color blind, he must have inherited the color blindness gene from his mother (the paternal grandmother) who was likely a carrier. However, the son has married a woman whose family has no history of color blindness. This means that the son has a 50% chance of inheriting the color blindness gene from his father.
Probability of the grandson being color blind:
Since the son has a 50% chance of inheriting the color blindness gene, the grandson also has a 50% chance of inheriting the gene from his father. However, since the son's wife has no history of color blindness in her family, it is highly unlikely that she is a carrier of the gene. Therefore, the grandson has a negligible chance of inheriting the color blindness gene.
Therefore, the probability of the grandson being color blind is extremely low, approaching zero. This is why the correct answer is option 'C', Nil.
Here's the explanation:
Explanation:
Color blindness:
Color blindness is a genetic condition that affects the perception of colors. It is more common in males because the genes responsible for color vision are located on the X chromosome. Since males have only one X chromosome, they are more likely to be affected by color blindness if they inherit the gene mutation.
Inheritance of color blindness:
Color blindness is typically inherited in an X-linked recessive pattern. This means that the gene mutation causing color blindness is located on the X chromosome. Females have two X chromosomes, so they can be carriers of the color blindness gene without being affected by the condition themselves. Males, on the other hand, have only one X chromosome, so if they inherit the gene mutation, they will be color blind.
Scenario:
In the given scenario, the father is color blind, but the mother has normal color vision and no history of color blindness in her family. This suggests that the mother is not a carrier of the color blindness gene.
Probability of the son being color blind:
Since the father is color blind, he must have inherited the color blindness gene from his mother (the paternal grandmother) who was likely a carrier. However, the son has married a woman whose family has no history of color blindness. This means that the son has a 50% chance of inheriting the color blindness gene from his father.
Probability of the grandson being color blind:
Since the son has a 50% chance of inheriting the color blindness gene, the grandson also has a 50% chance of inheriting the gene from his father. However, since the son's wife has no history of color blindness in her family, it is highly unlikely that she is a carrier of the gene. Therefore, the grandson has a negligible chance of inheriting the color blindness gene.
Therefore, the probability of the grandson being color blind is extremely low, approaching zero. This is why the correct answer is option 'C', Nil.
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A colour blind man marries a woman with normal sight who has no history of colour blindness in her family. His son also marries a woman whose family has no history of color blindness. What is the probability of their grandson through the Sonbeing colour blind?a)1b)0.25c)Nild)0.5Correct answer is option 'C'. Can you explain this answer?
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A colour blind man marries a woman with normal sight who has no history of colour blindness in her family. His son also marries a woman whose family has no history of color blindness. What is the probability of their grandson through the Sonbeing colour blind?a)1b)0.25c)Nild)0.5Correct answer is option 'C'. Can you explain this answer? for NEET 2024 is part of NEET preparation. The Question and answers have been prepared according to the NEET exam syllabus. Information about A colour blind man marries a woman with normal sight who has no history of colour blindness in her family. His son also marries a woman whose family has no history of color blindness. What is the probability of their grandson through the Sonbeing colour blind?a)1b)0.25c)Nild)0.5Correct answer is option 'C'. Can you explain this answer? covers all topics & solutions for NEET 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for A colour blind man marries a woman with normal sight who has no history of colour blindness in her family. His son also marries a woman whose family has no history of color blindness. What is the probability of their grandson through the Sonbeing colour blind?a)1b)0.25c)Nild)0.5Correct answer is option 'C'. Can you explain this answer?.
A colour blind man marries a woman with normal sight who has no history of colour blindness in her family. His son also marries a woman whose family has no history of color blindness. What is the probability of their grandson through the Sonbeing colour blind?a)1b)0.25c)Nild)0.5Correct answer is option 'C'. Can you explain this answer? for NEET 2024 is part of NEET preparation. The Question and answers have been prepared according to the NEET exam syllabus. Information about A colour blind man marries a woman with normal sight who has no history of colour blindness in her family. His son also marries a woman whose family has no history of color blindness. What is the probability of their grandson through the Sonbeing colour blind?a)1b)0.25c)Nild)0.5Correct answer is option 'C'. Can you explain this answer? covers all topics & solutions for NEET 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for A colour blind man marries a woman with normal sight who has no history of colour blindness in her family. His son also marries a woman whose family has no history of color blindness. What is the probability of their grandson through the Sonbeing colour blind?a)1b)0.25c)Nild)0.5Correct answer is option 'C'. Can you explain this answer?.
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