The Two Different Means of Achieving Dosage Compensation for X-linked Genes Employed by Drosophila and Mammals
As shown in the previous chapter, the X-linked genes of Drosophila are included in the euchromatic region which never becomes heterochromatic. The male is endowed with one dose, while the female receives two doses of the euchromatic region of the X. During the course of evolution of this insect, the dosage compensation mechanism must have developed one by one for each individual X-linked gene.
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