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X-chromosome inactivation is a phenomenon that A. establishes dosage compensation in mammals so that males and...

X-chromosome inactivation is a phenomenon that

A.

establishes dosage compensation in mammals so that males and females express the same levels of genes on the X chromosome.
B.

is responsible for the fact that males in mammalian species are hemizygous.
C.

is observed in Drosophila so that males and females express the same levels of X chromosome gene products.
D.

Two of the above answers correctly finish the sentence.
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Answer #1

Option A

Dosage compensation is the process of equating the amount of proteins formed by X chromosome in both females and males.

X chromosome inactivation is the process of inactivation of one of the female X chromosomes in mammals so, as to equate the amount of proteins synthesized by X chromosome in both males and females.

X chromosome hyperactivation occurs in male drosophila so as to double the amount of proteins formed by X chromosome.

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