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Drosophila melanogaster: Sex Linked Inheritance Pattern of White Eye Color I. Introduction Drosophila (fruit flies) has a four-stage life cycle. A Drosophila is only an egg for about 36 hours before it becomes a larva. During this time, it will crawl around and feed on the media for about five days until it crawls out to a dry place where it can pupate. As the Drosophila pupates, it is going though a metamorphosis, the eye color …

…to prevent any mating between generations that would affect the outcome. The F1 generation emerges as adults, they were anesthetized, sexed and eye color was determined in the same way the P1 generations were. A new vial is prepared and 5 females and 5 males were placed in it. After a week the F1 flies were released. The fifth week the F2 generations emerge as adults, about 200 were counted. I anesthetized, sexed and determined their eye color.