Question

When an individual heterozygous for a trait is crossed with an individual homozygous recessive for the trait, the offspring produced will?

Answer 1

When a single trait is being studies, a test cross is a cross between an individual with the dominant phenotype but of unknown genotype (homozygous or heterozygous) with a homozygous recessive individual. If the unknown is heterozygous, then approximately 50% of the offspring should display the recessive phenotype.