In humans, red-green color blindness is inherited as an X-linked recessive. If a color-blind woman marries a man with a normal vision what w

Question

In humans, red-green color blindness is inherited as an X-linked recessive. If a color-blind woman marries a man with a normal vision what will be the expected phenotypes of their children with respect to this trait?

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Mia 3 months 2022-02-13T04:52:53+00:00 1 Answer 0 views 0

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    2022-02-13T04:53:56+00:00

    Answer:

    The expected phenotypes are that the males would be colour blind while the females still possess normal vision in their phenotypes (heterozygous in genotype).

    Explanation:

    Since this trait is inherited as an X linked recessive trait, for a female to be affected she has to carry the recessive trait on both X chromosomes. but a male only need to carry the one recessive copy on his one X chromosome. let c rep the recessive trait. Thus, we have:

    color-blind female   x    normal vision male

                  Xc             Xc

    XC        XCXc       XCXc

    Y           XcY          XcY

    The expected phenotypes are that the males would be colour blind while the females still possess normal vision in their phenotypes (heterozygous in genotype).

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