Question

Fifty percent of the offspring produced by a cross between pea plants have seeds with a wrinkled (r) appearance caused by the presence of a homozygous recessive gene. What were the genotypes of the parents?

Answer 1

1. Rr, or rr. These are the possible genotypes

Answer 2

The correct answer would be Rr and rr.

The genotype of one parent should be heterozygous Rr and that of other's should be homozygous recessive rr.

Fifty percent of offspring show recessive trait during a test cross when a heterozygous parent is crossed with a homozygous recessive parent.