If a monkey has 14 chromosomes in their sperm how many chromosomes would be in their skin cells?

I’m doing some practice exam questions for biology, and i’m not sure how to do these 3 parts to the question.

In a cross between individuals of a species of tropical fish, all of the male offspring have long tail fins, and none of the females possess the trait. mating two of the f1 fish fails to produce females with the trait. explain the inheritance pattern of the trait.

Acell in the human nervous system whose primary function is to form myelin and the blood-brain barrier, respond to injury, remove debris, and enhance learning and memory is called a(n) cell.