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The Sxl gene is turned ____________ by a ratio of _____________for X:A.(a) OFF, 1(b) OFF, 0.5(c) ON, 0.5(d) ON, 0.75I got this question in exam.This is a very interesting question from Sex Determination in Drosophila topic in chapter Chromosomes and Sex Determination of Cytogenetics

Answer»

The correct choice is (B) OFF, 0.5

Explanation: The Sxl GENE is TURNED ON only when the RATIO of X:A is 1, other times it is OFF. An OFF state PRODUCES a male while on state produces a female.



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