Answer:
A- many more generic sins can be studied using short-lived organisms.
Step-by-step explanation:
Fruit flies, Drosophila melanogaster, are preferred organisms for genetic studies. Drosophila melanogaster has a short generation time, reproduces and survives well in laboratory conditions.
Its generation time is about two weeks. So, Drosophila melanogaster can produce large number of progeny in relatively short time. Due to its short generation time, scientists can study inheritance of particular genetic trait in many generations during a short time span.