When yellow-seeded pea plants (Yy) are crossed, what percent of their offspring is expected to be green-seeded?

To determine the expected percentage of green-seeded offspring when crossing yellow-seeded pea plants with a genotype of Yy (heterozygous for seed color), we can use a Punnett square.

The allele for yellow seeds (Y) is dominant, while the allele for green seeds (y) is recessive. By crossing two Yy plants, the potential combinations of their alleles can be represented as follows:

• The parental gametes from each plant can either contribute Y or y. Therefore, the possible genotype combinations from the cross are:

• YY (homozygous dominant)

• Yy (heterozygous)

• Yy (heterozygous)

• yy (homozygous recessive)

When we analyze these combinations, we find:

• 1 YY - yellow seeds

• 2 Yy - yellow seeds

• 1 yy - green seeds

From this Punnett square, we see that out of the four possible genotype combinations, only one results in green seeds (yy). Therefore, to find the percentage of offspring expected to be green-seeded, we take the number of green-seeded offspring (1) divided by the total number of offspring combinations (4) and