Which of the following genotypes would be

present if a recessive trait is expressed in the

phenotype?

dd, both parents would also be (dd) as well.

One of Gregor Mendel's greatest contributions to the study of heredity was the concept of dominance. Mendel observed that a heterozygoteoffspring can show the same phenotype as the parent homozygote, so he concluded that there were some traits that dominated over other inherited traits