Do flies have sex

An experienced fruit fly researcher can tell at a glance whether the fly she is observing is male or female; a distinct pigmentation pattern on a fly's body a type of bristle found only on the legs of males and differences in the genitalia are dead giveaways. But most of the fly's body parts look identical in males and females, and until now, scientists had no idea whether "maleness" or "femaleness" extended to all of the insect's cells and tissues. In a study publishing in the online, open access journal PLoS Biology , researchers at the Janelia Farm Research Campus of the Howard Hughes Medical Institute find that most cells in flies' bodies are identical, regardless of whether they are in a male or a female. This is because the influence of sex-determining genes is restricted to specific tissues, says Bruce Baker, a group leader who conducted the research with colleagues Carmen Robinett, Alex Vaughan, and Jon Michael Knapp.
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These Flies Are Getting More Action Than You

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Male or female? In flies, some cells can't tell -- ScienceDaily

By Andy Coghlan. Male fruit flies seem to enjoy ejaculation as much as men do. Galit Shohat-Ophir of Bar-Ilan University in Ramat Gan, Israel and her colleagues engineered male fruit flies so that they could make them ejaculate at will. Once activated, the neurons produced corazonin, a chemical that makes the flies ejaculate. In humans, it has a counterpart called neuropeptide Y, levels of which are reduced in people with depression or post-traumatic stress disorder. The first question the team addressed was whether ejaculation itself triggered pleasure, as it does in human males.
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Loud sex can be deadly for flies

Houseflies live only 15 to 30 days, but they devote a significant portion of those days to reproduction. Mating starts with a short courtship process initiated by the male. The male is in charge of housefly courtship.
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All rights reserved. Are they intended to actually wound the female during mating? Do they help the male fly to scrape out the sperm of his rivals?
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