In Some Fruit Flies, an Inversion Involving the White-Eyed Locus

question 24

Essay

In some fruit flies, an inversion involving the white-eyed locus (w) moves the w+gene from one end of the X chromosome to a location nearer to the centromere. Flies with a w+ or w+/w genotype are normally expected to have red eyes. However, in flies with the inversion, the eyes are mottled with red and white. Explain why.

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Definitions:

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Margin Call

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The minimum amount of funds or securities that must be deposited in a margin account before trading on margin, serving as a security for credit risk.

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