In peas, the red color of the corolla dominates over the white, and the long stem dominates over the short one.

In peas, the red color of the corolla dominates over the white, and the long stem dominates over the short one. What ratio of white long-stemmed peas can be expected from crossing two heterozygous plants for both traits? Record the results of the cross.

Let’s designate the gene that determines the red color of the corolla of peas as C, then the gene for the white corolla will be c. Let’s designate the gene that leads to the development of a long stem in peas as P, then the gene for a short stem will be p.

Heterozygous peas for both traits under consideration will be designated as СсРр.

Such peas will produce sex cells CP, cf, cp and cp.

If you cross two such plants with each other, then the resulting offspring will be represented by the following options:

peas with red flower corollas and a long stem (CCPP, 4 CcPr, 2 CcPP, 2 CCPP);

peas with white corollas and a short stem (ccrr);

peas with white corollas and a long stem (2 ccPr, ccRR);

peas with red corollas and a short stem (2 Ссрр, ССрр).

Thus, long-stemmed peas with white flowers in relation to other options will be the proportion of 3:13.