A pea plant with red flowers is test crossed; half of the resulting progeny have red flowers, whereas the other half have white flowers. The genotype of the test -crossed parent was
A) rr.
B) either RR or Rr.
C) Rr.
D) RR.

Question

Quizplus · Accepted Answer

The test cross (crossing with a homozygous recessive individual) results in half of the progeny showing the recessive phenotype (white flowers), indicating that the test-crossed parent was heterozygous (Rr) for the trait.

A Pea Plant with Red Flowers Is Test Crossed; Half