Question

A generation chart of black and white mice is shown.
In steps 4 and 5, you reversed the process. You were shown the parents and offspring above. You did a
to identify the genotypes of the parents

Answer 1

You performed a test cross (a backcross).

That is, you used the offspring phenotypes from a cross with a homozygous recessive to infer whether the parent with the dominant phenotype was homozygous or heterozygous.