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barry barry
wrote...
Posts: 11630
12 years ago
Drosophila fruit flies, like mammals, have an X-Y sex-determination system. The insect differs from the mammalian system in an important respect, however. What is it?
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Staff Member
12 years ago
While Drosophila has X-Y sex determination, where XX individuals are female and XY individuals are male, studies have shown that sex determination is based on the ratio of X chromosomes to autosomes rather than on Y-linked genes. Thus, XO Drosophila develop as males and XXY Drosophila develop as females–the same X : autosome ratio as XY and XX individuals.
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