In D.melanogaster,when P cytotype (lab stock)females are crossed to M cytotype (wild)males,the resulting F₁ progeny are: A)normal. B)defective. C)normal:defective in a 1:1 ratio. D)normal:defective in a 1:2:1 ratio. E)normal:defective in a 3:1 ratio.

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Quizplus · Accepted Answer

In Drosophila melanogaster, the interaction between P cytotype (from lab stock) and M cytotype (from wild) does not inherently lead to defective progeny. The P-M system influences the regulation of transposable elements, and the cross described does not specify conditions that would lead to defective progeny. Therefore, the progeny are expected to be normal.

In DMelanogaster,when P Cytotype (Lab Stock)females Are Crossed to M Cytotype