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
A.
if a mutation occurs in the mother's brain cells.
B.
if a mutation occurs in the gametes.
C.
if a mutation occurs in the father's heart cells.
D.
only if a mutation occurs in both the mother's and father's cells.

Answer 1

d.only if a mutation occurs in both the mother's and father's cells.

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