News tagged with females

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

Ketamine works for female rats, too

A first of its kind study in female rats finds that a single, low dose of ketamine promotes resilience to future adverse events as it does in male rats. Published in eNeuro, the research addresses a critical gap in understanding ...

Feb 26, 2018
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Flu may impact brain health

Female mice infected with two different strains of the flu exhibit changes to the structure and function of the hippocampus that persist for one month after infection, according to new research published in JNeurosci.

Feb 26, 2018
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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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