Which of the following would cause a genetic disease to be inherited by a human embryo?
A) Some of the father's red blood cells expel their nucleus and die after a few weeks.
B) The mother undergoes random genetic changes that lead to cancer in her uterus.
C) The mother's skin cells are exposed to ultraviolet radiation, and they develop tumors.
D) A primary spermatocyte in the father forms a sperm cell with 22 chromosomes.