Question

which statement best describes the relationship between the alleles for round and wrinkled seeds? the allele for round seeds is codominant with the allele for wrinkled seeds. the allele for wrinkled seeds is incompletely dominant over the allele for round seeds. the allele for wrinkled seeds is dominant over the allele for round seeds. the allele for round seeds is dominant over the allele for wrinkled seeds.

Explanation:

In Mendelian genetics, for pea - seed shape, the allele for round seeds (R) is dominant over the allele for wrinkled seeds (r). This means that when an organism has at least one copy of the round - seed allele, it will have round seeds. Codominance is when both alleles are expressed simultaneously, and incomplete dominance results in an intermediate phenotype. Neither of these applies here as the round allele masks the wrinkled allele.

Answer:

The allele for round seeds is dominant over the allele for wrinkled seeds.