In Drosophila, the genes that determine the length of the wings and legs are localized on chromosome II. From crossing flies with short wings and normal legs, with flies with normal wings and short legs, 96 F1 hybrids were obtained. They all had normal wings and legs. Determine: 1) which features are dominant; 2) what offspring can be obtained from backcrossing of F1 hybrids with the mother (there is no crossing over).
1) Dominant features – normal wings (A) and normal legs (B), recessive – short wings (a) and short legs (b).
2) From backcrossing F1 hybrids with the mother, provided that there is no crossing over, offspring with short wings and normal legs and with normal wings and legs in a 1: 1 ratio can be expected.
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