Question

what is a test cross used for?

Answer 1

to test the probability or likelihood of getting a certain outcome.

Answer 2

to determine if the organism is homozygous or heterozygous for the particular trait.

Answer 3

Breeding an offspring with the dominant phentype with an organism with the recessive phenotype;the type of the offspring of the cross can help to determine the genotype of the parent with the dominant phenotype. :)