Crossed male Drosophila flies with a gray body and normal wings with females with a black body and shortened wings. All hybrids of the first generation were with a gray body and normal wings. When the obtained hybrids were crossed among themselves, 75% of individuals with a gray body and normal wings and 25% with a black body and shortened wings appeared. Make a scheme for solving the problem. Identify the parental and progeny genotypes F1 and F2. Explain the nature of the inheritance of the trait and the results obtained.
1) parental genotypes of AABB (gamete AB), aabb (gamete ab),
2) offspring genotypes F 1: AaBb gray body normal wings (gametes AB, ab); body coloring genes and wing lengths are inherited linked; 3) offspring genotypes F 2: 3 gray body, normal wings (AABB, AaBb): 1 black body, shortened wings (aabb).
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