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A man whose father was colour blind marries a woman who had a colour blind mother and normal father. What percentage of male children of this couple will be colour blind? [2013]
- a)25%
- b)0%
- c)50%
- d)75%
Correct answer is option 'C'. Can you explain this answer?
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Verified Answer
A man whose father was colour blind marries a woman who had a colour b...
As color blindness is an autosomal recessive genetic disorder, for it is present at X -chromosome. Thus, according to the situation given in the question, a man whose father was color blind (will be, i.e, XY normal) marries a woman whose mother was color blind and father was normal (i.e, this woman will be a carrier) according to the cross given in the first figure.
Thus, when marriage will happen between a normal man and a carrier woman, in that case, the percentage of a male child to be colorblind is 25% (this can be easily observed from the second figure).So, the correct answer is '50%'.
Thus, when marriage will happen between a normal man and a carrier woman, in that case, the percentage of a male child to be colorblind is 25% (this can be easily observed from the second figure).So, the correct answer is '50%'.
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A man whose father was colour blind marries a woman who had a colour b...
Solution:
The given information can be represented as follows:
Father of the man is colour blind (XcY)
Mother of the man is not colour blind (XX)
Mother of the woman is a carrier of colour blindness (XBXb)
Father of the woman is not colour blind (XY)
Possible gametes of the man are XY and XcY.
Possible gametes of the woman are XB and Xb.
The Punnett square for the cross can be represented as follows:
| | XB | Xb |
|---|----|----|
| XY | XXB| XXb|
| XcY| XcB| Xcb|
From the above Punnett square,
The probability of having a son who is colour blind (XcY) is 1/4 or 25%.
The probability of having a son who is not colour blind (XY) is 3/4 or 75%.
Therefore, the percentage of male children of this couple who will be colour blind is 25%. Hence, the correct option is (C).
The given information can be represented as follows:
Father of the man is colour blind (XcY)
Mother of the man is not colour blind (XX)
Mother of the woman is a carrier of colour blindness (XBXb)
Father of the woman is not colour blind (XY)
Possible gametes of the man are XY and XcY.
Possible gametes of the woman are XB and Xb.
The Punnett square for the cross can be represented as follows:
| | XB | Xb |
|---|----|----|
| XY | XXB| XXb|
| XcY| XcB| Xcb|
From the above Punnett square,
The probability of having a son who is colour blind (XcY) is 1/4 or 25%.
The probability of having a son who is not colour blind (XY) is 3/4 or 75%.
Therefore, the percentage of male children of this couple who will be colour blind is 25%. Hence, the correct option is (C).
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A man whose father was colour blind marries a woman who had a colour blind mother and normal father. What percentage of male children of this couple will be colour blind? [2013]a)25%b)0%c)50%d)75%Correct answer is option 'C'. Can you explain this answer?
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A man whose father was colour blind marries a woman who had a colour blind mother and normal father. What percentage of male children of this couple will be colour blind? [2013]a)25%b)0%c)50%d)75%Correct 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 man whose father was colour blind marries a woman who had a colour blind mother and normal father. What percentage of male children of this couple will be colour blind? [2013]a)25%b)0%c)50%d)75%Correct 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 man whose father was colour blind marries a woman who had a colour blind mother and normal father. What percentage of male children of this couple will be colour blind? [2013]a)25%b)0%c)50%d)75%Correct answer is option 'C'. Can you explain this answer?.
A man whose father was colour blind marries a woman who had a colour blind mother and normal father. What percentage of male children of this couple will be colour blind? [2013]a)25%b)0%c)50%d)75%Correct 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 man whose father was colour blind marries a woman who had a colour blind mother and normal father. What percentage of male children of this couple will be colour blind? [2013]a)25%b)0%c)50%d)75%Correct 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 man whose father was colour blind marries a woman who had a colour blind mother and normal father. What percentage of male children of this couple will be colour blind? [2013]a)25%b)0%c)50%d)75%Correct answer is option 'C'. Can you explain this answer?.
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