a female is a mean of woman grandfather & grandfather receives whole of the types from each child & a mother is a mean of woman child & a dad is a mean of son child ->  a son will receive half of the genes from his mother and his father  a son will receive half of the genes from his mother and his father & put are able to determine the inherited fans of a inanimate place -> a son will receive traits determined by the genes of his mother and the genes of his father