Even
those with overweight children sometimes have other children that are
underweight and need to gain weight. My own children are the prime
example. My oldest daughter has inherited my characteristic of storing
most of her fat around her hips and thighs. However, my son is so skinny
that if he turns sideways he doesn't cast a shadow! (I know, you can't
fatten a thoroughbred!) Yet they have always eaten the same things.