Question

In Mendel's peas the alleles for flower color are P and p. The alleles for seed color are Y and y. A plant has the genotype Pp Yy. Which of the following genotypes are possible in a gamete from this plant?

1) PY
2) Pp
3) Pp Yy
4) yy

Answer 1

The possible genotypes in a gamete from a plant with the genotype Pp Yy are PY, Py, pY, and py.

Step-by-step explanation:

When a plant has the genotype Pp Yy, it means that it has one allele for flower color (P or p) and one allele for seed color (Y or y) on each of its homologous pairs of chromosomes. In a gamete, only one allele from each gene is passed on. Therefore, the possible genotypes in a gamete from this plant are PY, Py, pY, and py. This is because the plant can pass on either the P or p allele for flower color and either the Y or y allele for seed color. The genotypes Pp, Pp Yy, and yy are not possible in a gamete from this plant.