an insect is a kind of animal & a fruit fly is a kind of fly & a fly is a kind of insect ->  a fruit fly is a kind of animal  a fruit fly is a kind of animal & animals reproduce sexually ->  fruit flies reproduce sexually  fruit flies reproduce sexually & one parent is the source of 50% of the genes in a fertilized egg through sexual reproduction -> each fruit fly parent is the source of 50% of genes in a fertilized egg