News tagged with females

Related topics: offspring · women · proceedings of the royal society b · sperm · eggs

His and her pain circuitry in the spinal cord

New research released today in Nature Neuroscience reveals for the first time that pain is processed in male and female mice using different cells. These findings have far-reaching implications for our basic understanding ...

Jun 29, 2015
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Mentorship a key factor for female authorship in GI

The percentage of U.S. female physician authors of original research in major gastroenterology journals has grown over time, yet the percentage of women in the senior author position remains lower than expected based on the ...

Jun 09, 2015
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US regulators to discuss 'female Viagra'

A drug nicknamed the "female Viagra" because it could help increase women's sex drive, will be discussed for a third time at a meeting of an advisory committee to US regulators Thursday.

Jun 04, 2015
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Female (♀) is the sex of an organism, or a part of an organism, which produces mobile ova (egg cells). The ova are defined as the larger gametes in a heterogamous reproduction system, while the smaller, usually motile gamete, the spermatozoon, is produced by the male. A female individual cannot reproduce sexually without access to the gametes of a male (an exception is parthenogenesis). Some organisms can reproduce both sexually and asexually.

There is no single genetic mechanism behind sex differences in different species and the existence of two sexes seems to have evolved multiple times independently in different evolutionary lineages. Other than the defining difference in the type of gamete produced, differences between males and females in one lineage cannot always be predicted by differences in another. The concept is not limited to animals; egg cells are produced by chytrids, diatoms, water moulds and land plants, among others. In land plants, female and male designate not only the egg- and sperm-producing organisms and structures, but also the structures of the sporophytes that give rise to male and female plants.

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

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