Answer:
Drosophila is useful in the study of genetics
Step-by-step explanation:
Drosophila has a small genome that is fully sequenced. It has a short life span and gives rise to many offsprings. Hence new fly lines carrying different mutations are easy to make and study. Drosophila contains 75 % of genes that are responsible for human disease. Hence it is aptly called the "Cinderella" of genetics.