Answer: test cross
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
