News tagged with sex

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CDC offers guidelines for schools' sex education topics

The federal Centers for Disease Control has identified 16 topics which it says should be included in sex education classes offered to high school students in the U.S. Fewer than half of high schools and only a fifth of middle ...

Jan 18, 2016
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In vitro gametogenes: Just another way to have a baby?

New analysis by a George Washington University academic examines the possibility of using in vitro gametogenesis (IVG) for human reproduction and its ethical and practical implications. The paper is published today in the ...

Dec 17, 2015
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Sex

In biology, sex is a process of combining and mixing genetic traits, often resulting in the specialization of organisms into male and female types (or sexes). Sexual reproduction involves combining specialized cells (gametes) to form offspring that inherit traits from both parents. Gametes can be identical in form and function (known as isogametes), but in many cases an asymmetry has evolved such that two sex-specific types of gametes (heterogametes) exist: male gametes are small, motile, and optimized to transport their genetic information over a distance, while female gametes are large, non-motile and contain the nutrients necessary for the early development of the young organism.

An organism's sex is defined by the gametes it produces: males produce male gametes (spermatozoa, or sperm) while females produce female gametes (ova, or egg cells); individual organisms which produce both male and female gametes are termed hermaphroditic. Frequently, physical differences are associated with the different sexes of an organism; these sexual dimorphisms can reflect the different reproductive pressures the sexes experience.

This text uses material from Wikipedia, licensed under CC BY-SA

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