Question

what is test cross?​

Answer 1

Answer:

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. ... This means that the genotype of an organism with a dominant phenotype may be either homozygous or heterozygous for the dominant allele.

Answer 2

Answer:

Under the law of dominance in genetics, an individual expressing a dominant phenotype could contain either two copies of the dominant allele or one copy of each dominant and recessive allele. By performing a test cross, one can determine whether the individual is homozygous or heterozygous dominant.