What is the probability that the offspring of a homozygous dominant individual and a homozygous recessive individual will exhibit the dominant phenotype?

1.0

Step-by-step explanation:

Let say the homozygous dominant is designated with AA and the homozygous recessive individual is designated aa

by crossing them using punnet square will yield

Aa, Aa, Aa, Aa since all of the first generation have the dominant A, then all the first generation will have the phenotype of A which means the probability is 1