In beans, the black color of the seed coat A dominates over the white color of a. A plant homozygous for the black

In beans, the black color of the seed coat A dominates over the white color of a. A plant homozygous for the black seed color, crossed with a plant whose seed coat has a white amusement. Determine the phenotypes of the first and second generation plants.

Given: A – black color of the seed coat

a – white color of the seed coat

We proceed to crossbreeding:

R: AA x aa

Both parental individuals are homozygous, which means they give only one type of gametes: A and a, respectively.

When crossing, first generation hybrids are obtained with the following genotypes:

G1: Aa

All hybrids of the first generation in this case will have a black seed coat.

When crossed, hybrids of the first generation give two types of gametes: A, a.

In this case, the resulting hybrids of the second generation have the following genotypes:

G2: AA, Aa, Aa, aa

Second generation hybrids have the following phenotypes:

AA – black color of the seed coat

Aa – black color of the seed coat

aa – white color of the seed coat