In Drosophila, an allele causing vestigial wings is 12.5 mu away from another gene that causes purple eyes. A third gene that affects body colour has an allele that causes black body colour. This third gene is 18.5 m.u. away from the vestigial wings gene and 6 m.u. away from the gene causing purple eyes. The alleles causing vestigial wings, purple eyes and black body are all recessive. The dominant (wildtype traits) are long wings, red eyes, and grey body. A researcher crossed wild-type flies to flies with vestigial wings, purple eyes and black body. All F1 flies were wildtype. F1 females were crossed to males with vestigial wings, purple eyes and black body. If 1,000 offspring were observed, what are the expected numbers of the following types of flies: Long wings, red eyes, grey body Long wings, purple eyes, grey body Long wings, red eyes, black body Long wings, purple eyes, black body Short wings, red eyes, grey body Short wings, red eyes, black body Short wings, purple eyes, grey body Short wings, purple eyes, black body Which kinds of flies can be produced only by a double crossover event
In Drosophila, an allele causing vestigial wings is 12.5 mu away from another gene that causes purple eyes. A third gene that affects body colour has an allele that causes black body colour. This third gene is 18.5 m.u. away from the vestigial wings gene and 6 m.u. away from the gene causing purple eyes. The alleles causing vestigial wings, purple eyes and black body are all recessive. The dominant (wildtype traits) are long wings, red eyes, and grey body. A researcher crossed wild-type flies to flies with vestigial wings, purple eyes and black body. All F1 flies were wildtype.
F1 females were crossed to males with vestigial wings, purple eyes and black body. If 1,000 offspring were observed, what are the expected numbers of the following types of flies:
Long wings, red eyes, grey body
Long wings, purple eyes, grey body
Long wings, red eyes, black body
Long wings, purple eyes, black body
Short wings, red eyes, grey body
Short wings, red eyes, black body
Short wings, purple eyes, grey body
Short wings, purple eyes, black body
Which kinds of flies can be produced only by a double crossover event?
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