ANDY'S ANSWER: You inherit your genetics from your parents, but some of the traits in those genetics are from previous generations that perhaps your parents didn't develop, but still passed along to you.

For example, my parents are both relatively short, but one of my grandfathers was very tall, so I got the tall gene from him.

Maybe your body hair is a gift from one of your grandparents or even a great-grandparent.

Below is the recording of Andy answering this question.