Hybrid dysgenesis refers to the fact that in Drosophila a cross between a P male and an M female produce offspring that are

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Hybrid dysgenesis in Drosophila results in the production of sterile offspring when a P male (carrying P elements) is crossed with an M female (lacking P elements). This is due to the insertion of P elements, which are mobile genetic elements, into the germ cells of the offspring, resulting in mutations and chromosomal rearrangements that cause sterility. Thus, the best choice is D. The other options (A, B, C, and E) are not consistent with the known effects of hybrid dysgenesis in Drosophila.

Hybrid Dysgenesis Refers to the Fact That in Drosophila a Cross