Question

Gametes in humans are haploid. This means that they have half the number of chromosomes as normal body cells. Sometimes, the gamete of a male and the gamete of a female combine to form a zygote that will eventually turn into a fetus. Phenotypic changes in a fetus may result only if a mutation occurs in both the mother's and father's cells. if a mutation occurs in the mother's brain cells. if a mutation occurs in the gametes. if a mutation occurs in the father's heart cells.