MCAT Question of the Day
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    Q:

    		 A student is studying sex-linked traits and finds that the only afflicted individuals in a family are males. The student concludes that the gene is X-linked and that some of the females in the family, while unafflicted, may still be carriers. Is this conclusion accurate?
    		 

    A

    		 Yes, because an autosomal recessive X-linked gene can produce the phenotypes observed without any females being afflicted.

    B

    		 Yes, because males are always more susceptible to expressing X-linked traits.

    C

    		 No, because the gene could be Y-linked which would produce the same phenotypes observed.

    D

    		 No, because X-linked traits must be expressed in the phenotypes in any female carriers.



    Mendelian Concepts |
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