NEET Biology question
A man whose father was colour blind marries a woman who had a colour-blind mother and a normal father. What percentage of the male children of this couple will be colour blind?
Answer: (C)
Solution
Since a man receives his X chromosome only from his mother (never his father), the man's father being colour blind has no bearing on the man's own genotype; as a phenotypically normal man, his genotype is simply . The woman's mother was colour blind (), so the woman necessarily inherits an
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