Determine the phenotype of the peas. (yellow seed – A, green – a, even – B, uneven – b). Genotypes: AABb, AaBb, aabb, aaBB. If you cross pea plants with genotypes AaBB x aabb, then what genotypes and phenotypes can the offspring have?
In the “AaBB” genotype, the first trait is heterozygous, the second is dominant homozygous. And “aavv” is recessive homozygous. The first organism forms two sorts of germ cells: AB and aB, and the second one – one sort: ab. During fertilization, that is, the fusion of these gametes, the appearance of organisms with genotypes is possible:
gametes ab AB AaBb aB aaBb
Obtained by phenotype: AaBb – yellow even
aaBb – green even
by genotype: AaBb – diheterozygous
aaBb – recessive homozygous on the first basis, heterozygous on the second;
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