In peas, the red color of the flowers dominates over the white, and the tall growth over the dwarf.

In peas, the red color of the flowers dominates over the white, and the tall growth over the dwarf. Traits are inherited independently. By crossing two plants with red flowers, one of which was tall and the other short, 35 tall plants with red flowers, 32 low plants with red flowers, 10 tall plants with white flowers and 13 low white flowers were obtained. What are the genotypes of the parents?

Let’s designate the gene for red color of pea flowers as B, then the gene for white color of pea flowers will be in. Let’s designate the gene that causes the high growth of peas as C, then the gene for dwarfism of this plant will be c.

In the offspring of pea plants with red flowers, plants with white flowers —bb were obtained, which allows us to conclude that both parental plants are heterozygous.

Since dwarf plants – cc were obtained in the offspring, it should be concluded that the tall parent plant is heterozygous.

Thus, tall peas with red flowers will be BbCc, the germ cells produced by it – bc, BC, bC and Bc.

Dwarf peas with red flowers – Bvcc, the germ cells produced by it – bc and Bc.

The offspring theoretically obtained from crossing the described plants:

dwarf pea plants with white flowers (bbcc);

tall peas with red flowers (BbCc, BBCc);

tall peas with white flowers (2bbСс);

dwarf peas with red flowers (2Bbcc, BBcc).

Answer: tall peas with red flowers – BbCc, dwarf peas with red flowers – Bbcc.