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  • How does dosage compensation occur in Drosophila?Option: 1 By inactivating one X chromosome in femalesO

How does dosage compensation occur in Drosophila?

Option: 1

By inactivating one X chromosome in females


Option: 2

By activating one X chromosome in males


Option: 3

By duplicating the X chromosome in males


Option: 4

By deleting one X chromosome in females


Answers (1)

best_answer

Dosage compensation in Drosophila occurs by inactivating one of the two X chromosomes in females. This ensures that the same amount of gene products are produced from X-linked genes in both males (which only have one X chromosome) and females (which have two X chromosomes). In Drosophila, this is achieved through the expression of the X-linked gene, Xist (X-inactive specific transcript), which is responsible for the transcriptional silencing of one of the X chromosomes in females. This process is called X-inactivation or X-chromosome dosage compensation. In males, the single X chromosome is fully expressed without the need for dosage compensation.

Option 1 is the correct answer.

Posted by

Ritika Kankaria

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