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Both Drosophila and mammals have XY system of sex determination. Dosage compensation y inactivation of one X chromosome is seen in ___________________

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Both Drosophila and mammals have XY system of sex determination. Dosage compensation y inactivation of one X chromosome is seen in ___________________

(a) Mammals

(b) Drosophila

(c) Metaphase

(d) Telophase

I got this question in an interview.

I'd like to ask this question from Dosage Compensation Mechanism for X linked Genes topic in portion Chromosomes and Sex Determination of Cytogenetics

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Correct choice is (a) Mammals

Explanation: Only in case of mammals dosage compensation mechanism is by inactivation of one X chromosome. In Drosophila there is a different mechanism.

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