Which of the following are reasons that Drosophila are an ideal experimental animal? Select all that apply. r They are easy to grow and maintain in a lab. n Afemale has very few offspring each reproductive cycle. r They are relatively cheap to maintain in a lab r Their life cycle is not well understood. r They have a small number of well characterized chromosomes. They do not have very many easily observable phenotypes. They have a long generation time. Solution They are easy to grow and maintain in a lab They are relatively cheap to maintain in a lab They have a small number of well characterized chromosomes..