Red-green colorblindness is a recessive X-linked disorder. A woman who is homozygous for normal vision has children with a man who has red-green colorblindness. Which of the following phenotypes would NOT be possible in their children?

a) sons with red-green colorblindness
b) daughters who are heterozygous for the red-green colorblindess gene
c) daughters who have normal vision
d) sons who have the normal allele


Ans: a) sons with red-green colorblindness

Biology & Microbiology

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