What do apples and people have in common? “Extreme heterozygosity,” a term you may recognize from biology class, sounds like it could be some bizarre trait, but it is actually a reproductive characteristic that humans and apples have in common. In simplified terms, no two apple trees are alike, just like no two people are alike. This is because they are cross pollinated (have two parents), and because each gene they inherit is randomly selected from several possibilities. As a … Keep Reading