Sapling Learning Color blindness is a sex-linked recessive trait. A female is co

Question

Sapling Learning Color blindness is a sex-linked recessive trait. A female is color blind in one eye, but not both. Select the explanation for this condition. O O O female has XO genotype all X chromosomes are inactivated silencing of different X chromosomes Is it possible for a male to have different color-blindness phenotypes in each eye? O O O O no, since trisomy of the sex chromosomes is lethal yes, in an XXY male with a different active X in each eye no, since XXY males inactivate both x chromosomes yes, in an XYY male with a different active Y in each eye O Previous Giv. Up & View Solution 0 Check Answer @ Nexl Exit Hint p 5

Explanation / Answer

=> silencing of different X chromosomes. The given condition may arise due to random X-chromosome inactivation. Due to this, one cell could have maternal X inactivation, while at the same time, the adjacent cell may have paternal X inactivation. Thus, different cells would have expression of different alleles of X-linked genes.

=> yes, in an XXY male with a different active X in each eye. This way phenomenon of random X-chromosome inactivation is valid.

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