Will give brainliest

The only cells that contribute to an offspring genotype are? choose all that apply.
a. liver cells
b. gametes
c. skin cells
d. somatic
e. egg and sperm

According to Nature. com, "A genetic mutation known as CCR5-delta 32 is responsible for the two types of HIV resistance that exist. CCR5-delta 32 hampers HIV's ability to infiltrate immune cells. The mutation causes the CCR5 co-receptor on the outside of cells to develop smaller than usual and no longer sit outside of the cell." Which statement explains how these mutations occur?
a. A mutation occurs when HIV enters the cell
b. A mutation occurs when nucleic acids are replicated
c. A mutation occurs during mitosis

A female, heterozygous for dark hair and freckles married a male homozygous dominant for dark hair and he has no freckles. What % of their offspring will have dark hair and freckles?
a. 56%
b. 50%
c. 19%
d. 100%