News tagged with females
The power of estrogen -- male snakes attract other males
A new study has shown that boosting the estrogen levels of male garter snakes causes them to secrete the same pheromones that females use to attract suitors, and turned the males into just about the sexiest ...
Feb 10, 2012 |
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Female fertility affects men's linguistic choices
The likelihood that a man will match his language to that of a female conversation partner depends on how fertile she is, according to a study published Feb. 8 in the open access journal PLoS ONE.
Feb 08, 2012 |
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Competitive soccer linked to increased injuries and menstrual dysfunction in girls
In the U.S., there are nearly three million youth soccer players, and half of them are female. New research presented today at the 2012 Annual Meeting of the American Academy of Orthopaedic Surgeons (AAOS) found that despite ...
Feb 07, 2012 |
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Copper + love chemical = big sulfur stink
When Hiroaki Matsunami, Ph.D., at Duke set out to study a chemical in male mouse urine called MTMT that attracts female mice, he didn't think he would stumble into a new field of study.
Feb 06, 2012 |
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Gene related to fat preferences in humans found
A preference for fatty foods has a genetic basis, according to researchers, who discovered that people with certain forms of the CD36 gene may like high-fat foods more than those who have other forms of this gene.
Feb 03, 2012 |
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Sex-specific behaviors traced to hormone-controlled genes in the brain
Hormones shape our bodies, make us fertile, excite our most basic urges, and as scientists have known for years, they govern the behaviors that separate men from women. But how?
Feb 02, 2012 |
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Male spiders of one species lose their genitals after sex to increase sperm count in females
(PhysOrg.com) -- Researchers have known for some time that the male sex organ, called a palp, in orb-web spiders is often broken off during copulation with females; what hasn’t been so clear is why. ...
Feb 02, 2012 |
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Survivors of violence benefit from mentoring
Can mentoring relationships help female students who survive childhood abuse or domestic violence? Absolutely, according to new research from Concordia University, published in the Journal of College Student Development.
Feb 01, 2012 |
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Abortion curb restores birth sex ratio in Taiwan
Taiwanese health authorities said Tuesday that tougher checks on illegal gender-selective abortions prevented nearly 1,000 terminations of female foetuses last year.
Jan 31, 2012 |
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Monogamous birds... peeping on the neighbors!
(PhysOrg.com) -- It is well documented that male birds seduce females using their songs, colourful plumage and courtship dances. These signals reflect male genetic quality and will be graded by the female ...
Jan 27, 2012 |
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Multiple births lead to weight gain and other problems for mouse moms and male offspring
Women have long bemoaned the fact that as they have more children, their weight gain from pregnancy becomes more difficult to lose. A new study using a mouse model that mimics the human effects of multiparity (giving birth ...
Jan 26, 2012 |
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Scientists reveal how females store sperm for decades
(PhysOrg.com) -- Scientists have discovered that all sorts of females – from birds to reptiles to insects – have a nifty trick to prolong the lifespan of sperm, letting them store it for weeks, months ...
Jan 26, 2012 |
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Gardasil does not trigger autoimmune conditions after vaccination
Gardasil, the human papillomavirus vaccine that is now recommended for male and female adolescents and young adults, does not trigger autoimmune conditions such as lupus, rheumatoid arthritis, type 1 diabetes or multiple ...
Medicine & Health / Medications
Jan 25, 2012 |
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Why men 'exhibit warrior tendencies'
A new study has looked into how our psychology concerning war and conflict may have been shaped by our evolutionary past.
Medicine & Health / Psychology & Psychiatry
Jan 24, 2012 |
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Bonobos' unusual success story
Mate competition by males over females is common in many animal species. During mating season male testosterone levels rise, resulting in an increase in aggressive behavior and masculine features. Male bonobos, ...
Jan 23, 2012 |
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Female
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.
For more information about Female, read the full article at
Wikipedia.
This text uses material from Wikipedia and is available under the GNU Free Documentation License.
