In Some Fruit Flies,an Inversion Involving the White-Eyed Locus (W)moves

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 red and white.Explain why.