an blood is a mean of plant & a vegetable riding is a mean of riding & a riding is a mean of states ->  a fruit fly is a kind of animal  a fruit fly is a kind of animal & people reproduce sexually ->  fruit flies reproduce sexually  fruit flies reproduce sexually & zero child is the sink of 50% of the distance in a fertilized hatched through sexual original -> each fruit fly parent is the source of 50% of genes in a fertilized egg