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Which one of the following is true for Drosophila?(a) They don’t have X chromosome(b) One of the female X chromosome is inactivated(c) The male Y chromosome is inactivated(d) The male X chromosome is hyper activeThe question was asked by my school teacher while I was bunking the class.My question is taken from Dosage Compensation Mechanism for X linked Genes topic in chapter Chromosomes and Sex Determination of Cytogenetics

Answer»

Right answer is (d) The male X chromosome is hyper active

The best EXPLANATION: In Drosophila, DOSAGE compensation is achieved in a different way. The male’s X chromosome appears to be hyperactivated, ALLOWING it to be transcribed at twice the rate of either X chromosome in the female.



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