Drosophila sleep is also effected by the circadian rhythm within them. Circadian rhythms are physical, mental, and behavioral changes that follow a roughly 24 hour cycle, responding primarily to light and darkness in an organism’s environment. They are found in most living things, including animals, plants, and tiny microbes (National Institute of Health 2012). Circadian rhythms are related with sleep in Drosophila because Drosophila has a circadian rhythm of their own. The circadian clock in Drosophila can be described as having a certain number of genes that are turned on when the animal is exposed to light: effector genes whose products mediate the animal’s responses and clock genes whose products regulate the circadian clock. Two key members
