Question

In pea plants the allele for round seeds (R) is dominant and the allele for wrinkled seeds (r) is recessive. Under what conditions would we observe wrinkled seeds in a pea plant?

Group of answer choices

When the plant inherits a dominant allele from both parents

When the plant inherits a recessive allele from both parents

When the plant has a genotype RR

When a plant has a heterozygous allelic pair of the gene for seed shape

Answer 1

Correct answer: When the plant inherits a recessive allele from both parents.

Explanation: Wrinkled seed shape is recessive (r), so the phenotype appears only in homozygous recessive plants (rr). Heterozygotes (Rr) and homozygous dominant (RR) produce round seeds.