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TLS Online TPP Program

#Question id: 4760

you set up a cross between true breeding wild type male fruit flies and true breeding female flies with a yellow body color. you notice in the f1 generation that half the flies, specifically all the males, have yellow body color while the females are wild type (gray). which of the following explanations is the most likely?

#SCPH12 I Genetics

  1. some of your females had already mated with yellow males before you collected them.

  2. some of your parental flies must have had a new mutation in their germ cells.

  3. the mutation which causes yellow body color is on the x chromosome.

  4. the mutation which causes yellow body color is on the y chromosome

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