Question

An individual displays two dominant alleles but it is not known if that individual is homozygous dominant of heterozygous for those traits. That individual is crossed with another individual that is homozygous recessive for both traits. This genetic cross is referred to as a ______.

Answer 1

Answer: test cross

Step-by-step explanation:

To uncover the zygousity (whether homozygous or heterozygous) of the individual, apply test cross.

To do this: cross the individual (parent) with unknown trait with an individual with a known homozygous trait and observe the offspring.

A) If the unknown parent is homozygous dominant, all offspring will express the dominant phenotype.

B) However, if the unknown parent is heterozygous, half the offspring should be dominant and half recessive