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In Drosophila, individual X-linked genes are expressed at an approximately 2-fold higher level in males versus...

In Drosophila, individual X-linked genes are expressed at an approximately 2-fold higher level in males versus in females. A consequence of this is that X-linked genes are expressed at similar levels in males (XY) and females (XX). This phenomenon is known as

   chromosomal sex determination
   dosage compensation
   P element supression
   hybrid dysgenesis

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Answer #1

Dosage compensation is the phenomenon due to which this occurs.
Dosage comansation is the phenomenon according to which organism equalize the expression of genes between members of different biological sexes.

there are three types of mechanisms to attain dosage compansaion which are as follows:

1.Iinactivation of one of the X chromosomes of female of that organism. this occurs in human beings

2.Decreased trancription of X chromosomes to half ,as happens in C.elegans
?3. Increased trancription of male X chromosomes to double such as to match the double X chromosomes in females and this phenomenon ocuurs in Drosophilla melanogastor

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