A plant with yellow flowers was crossed with a plant with red flowers.All of the numerous offspring had red flowers.What does this show about the genotype of the parental plant with yellow flowers?

Question

Quizplus · Accepted Answer

A testcross is the cross of an individual with the dominant phenotype with a homozygous recessive individual.A homozygous dominant individual crossed with a homozygous recessive individual results in all offspring with dominant phenotype.Since red flowers are in offspring,then red is the dominant trait and yellow is the recessive trait.

A Plant with Yellow Flowers Was Crossed with a Plant