Question

What will be the phenotype of the offspring when a pea plant homozygous for round seeds is crossed with a pea plant producing wrinkled seeds?

• A. Both round and wrinkled seeds
• B. Round seeds
• C. Wrinkled seeds
• D. Neither round nor wrinkled seeds

Answer 1

The correct option is B Round seeds

Round shape of seeds is dominant over the wrinkled shape of seeds in pea plants.

Let R and r be the alleles responsible for round and wrinkled seeds respectively.

When a plant homozygous for round seeds (RR) is crossed with a plant with wrinkled seeds (rr), the following results are obtained.


All the $F_1$ offspring obtained are heterozygous for round seeds.