In Drosophila, the yellow (y) and the white (w) gene are both X-linked and recessive and...

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Biology

In Drosophila, the yellow (y) and the white (w) geneare both X-linked and recessive and 1 m.u. apart. You cross a truebreeding yellow female with wildtype red eyes with a male withwildtype body color and white eyes. You obtain all wildtype femalesin the F1. You testcross an F1 female with a yellow bodied malewith white eyes.

What is the expected proportion of the testcross malesthat are yellow with white eyes? Please explain youranswer.

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