You are doing a genetics experiment with the fruit fly. In the "P" generation, you cross two true-breeding flies. The female parent is brown and wingless and the male parent is black with normal wings. All of the flies in the F1 generation are brown and have normal wings. a) The genotypes of the flies in the P generation are: b) The genotype of the flies in the F1 generation is c) You now take an F1 female and cross her to a true-breeding black, wingless male . When you count the F2 generation, you really get: 78 brown winged flies 739 black winged flies 876 brown wingless flies 125 black wingless flies Map the distance
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In the P generation, the female parent is brown and wingless (bb ww) and the male parent is black with normal wings (BB WW). Therefore, the genotypes of the flies in the P generation are bb ww (female) and BB WW (male). Show more…
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You are conducting a genetics experiment with fruit flies. In the "P" generation, you cross two true-breeding flies. The female parent is brown and wingless, and the male parent is black with normal wings. All of the flies in the F1 generation are brown and have normal wings. Indicate the alleles with dominant phenotypes by capital letters and alleles associated with recessive phenotypes by lowercase letters. Assume the genes for the two traits you are following are found on autosomes. Indicate the wing alleles by the letters "N" and "n" and indicate the color alleles as "B" and "b.
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(2) You are doing an experiment with the fruit fly. In the P generation, you cross two true-breeding flies. The female parent is brown and wingless and the male parent is black with normal wings. All of the flies in the F1 generation are brown and have normal wings. Diagram the genotypes of the P and F1 generation P F1 You cross the F1 back to a true breeding black/wingless fly and count 1600 offspring in the F2 generation. If the wing and the color traits were tightly linked and no recombination occurred, you would expect to count: Expected # Phenotype __________ brown, winged flies __________ black, winged flies __________ brown, wingless flies __________ black, wingless flies When you count the F2 generation, you really get: Observed # Phenotype 85 brown winged flies 728 black winged flies 712 brown wingless flies 75 black wingless flies What is genetic distance between the color and wing genes?
Jenny W.
You now take an F1 female and cross her to a true-breeding black, wingless male. This male’s genotype is?
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