How is dosage compensation accomplished in Drosophila?
A) One of the two X chromosomes is inactivated in females.
B) Drosophila has no obvious mechanism of dosage compensation.
C) The Y chromosome has an increased level of gene expression.
D) The activity of genes on the male X chromosome is doubled but not that of genes on the X chromosome of females.
E) The activity of genes on half of the autosomes is doubled and the activity of genes on the X chromosomes of both males and females is decreaed.
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