Picture a bit of DNA that, during egg formation, shoves chromosomes with certain traits into the polar bodies. (polar bodies discard chromosomes to make the gen

Picture a bit of DNA that, during egg formation, shoves chromosomes with certain traits into the polar bodies. (polar bodies discard chromosomes to make the genome haploid) Children thus cannot inherit chromosomes containing the undesired DNA. This aggressive bit of DNA also avoids having itself end up in a polar body, ensuring that it will be inherited. Suppose you wanted to keep your descendants from having any appearance traits that might lead to discrimination issues, such as with AirBNB. DNA which causes that kind of physical appearance gets kicked out during egg formation, saving your descendants from much difficulty and misery.