LIFE SCIENCE

Detailed explanation-1: -The test cross is another fundamental tool devised by Gregor Mendel . In its simplest form, a test cross is an experimental cross of an individual organism of dominant phenotype but unknown genotype and an organism with a homozygous recessive genotype (and phenotype).

Detailed explanation-2: -A test cross is a way to explore the genotpye of an organism. Early use of the test cross was as an experimental mating test used to determine what alleles are present in the genotype.

Detailed explanation-3: -In the test cross invented by Mendel, the plant with the dominant phenotype is crossed with a plant that is homozygous for the recessive trait. If the unknown is homozygous, all offspring will have the dominant phenotype. If the unknown is heterozygous, half of the offspring will have the recessive phenotype.