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 * The sepia eye color is brown. “Ommochromes[brown] and drosopterins[red]” are responsible for the typical eye color of drosophila melanogaster. These mutations occur on the third chromosome. When mated with a wild type flies with red eyes will be dominant over sepia color eyes.² They are then classified as a recessive mutation in drosophila, and can only result in two-sepia colored flies mate. Sepia colored eyes are not dependent on the sex of the fly. The Sepia eye color decreases sexual activity in males and influences preference of females. ”

Kim, Jaekwang et al. “Identification and characteristics of the structural gene for the Drosophila eye colour mutant sepia, encoding PDA synthase, a member of the omega class glutathione S-transferases Biochemical journal vol. 398,3 (2006): 451-60.

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