In Drosophila, the gray color of the body (A) dominates over black, and the normal shape of wings (B) dominates over the twisted one (non-allelic genes are located in different autosomes). When gray flies with normal wings were crossed with gray flies with curled wings, one quarter of the offspring had a black body. In the offspring, 50% of individuals had normal wings, and 50% had gnarled wings. Make a diagram of the solution to the problem. Determine the genotypes of parents and offspring, the ratio of the types of phenotypes of individuals of this offspring. What type of inheritance of characters is manifested in this cross?
1) parental genotypes: P (women) AaBb, (male) Aabb;
2) offspring genotypes: 1AABb: 1AAbb: 2AaBb: 2Aabb: 1aaBb: 1 aabb
Phenotype splitting: 3/8 gray body normal wings; 3/8 gray body and twisted wings; 1/8 – black body and normal wings; 1/8 black body and twisted wings
3) since the genes are not linked, the laws of independent inheritance of characters are manifested.
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