Morgan selected fruit flies for his genetical experiments because a) They could be grown on simple synthetic medium in the laboratory. b) They complete their life cycle in about two weeks and a single mating could produce a large number of progeny flies. c)  Fruit flies are easily available hovering over banana where they feed on the yeast cells present in its surface. d) They can be reared inside the bottles having yeast culture. e) The animals can be temporarily inactivated with ether and examined with lens/dissection microscope.  f) Sexual dimorphism is present.   g) They have very less number of chromosomes.