What's the another factor for creating variation in the genetics of an organism?

Mutations must be in where in order to be passed on to the offspring?

Why are many cells in an individual different even though they have the same genetic instructions?

Process that involves a diploid cell dividing into 2 identical daughter cells

Cancer involves...

Meiosis

What's one of the factors responsible for creating variation among the gametes produced by an organism?

Sexual Recombination