News tagged with males
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 ...
20 hours ago |
4.8 / 5 (6) |
2
|
Scared of a younger rival? Not for some male songbirds
When mature male white-crowned sparrows duel to win a mate or a nesting territory, a young bird just doesn't get much respect.
Feb 08, 2012 |
4 / 5 (2) |
0
|
Study identifies new prostate cancer drug target
Research led by Wanguo Liu, PhD, Associate Professor of Genetics at LSU Health Sciences Center New Orleans, has identified a new protein critical to the development and growth of prostate cancer. The findings are published ...
Feb 06, 2012 |
5 / 5 (1) |
0
|
Combined asthma medication therapy shown to reduce attacks
A Henry Ford Hospital study has found that using two types of common asthma medications in combination reduces severe asthma attacks.
Feb 06, 2012 |
not rated yet |
0
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 |
5 / 5 (1) |
1
|
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 |
5 / 5 (2) |
2
|
Cancer drugs shown to cause mutations in mice offspring
(Medical Xpress) -- For many years, most of the studies done to see what effects cancer treatment has on the offspring of survivors, has involved radiation. This is because radiation is known to cause mutations in cells. ...
Jan 31, 2012 |
4 / 5 (2) |
0
|
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 |
not rated yet |
0
Ultrasound male contraceptive, overlooked for decades, confirmed to work
Imagine a contraceptive that could, with one or two painless 15-minute non-surgical treatments, provide months of protection from pregnancy. And imagine that the equipment needed were already in physical therapists' ...
Jan 30, 2012 |
5 / 5 (2) |
0
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 |
5 / 5 (1) |
0
|
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 |
not rated yet |
0
Tiny crooners: Male house mice sing songs to impress the girls
Male house mice produce melodious songs to attract mates. Unfortunately for us, because the melodies are in the ultra-sonic range human ears cannot detect them. Through spectrographic analyses of the vocalizations of wild ...
Jan 26, 2012 |
4.7 / 5 (3) |
0
Prenatal testosterone linked to increased risk of language delay for male infants, study shows
New research by Australian scientists reveals that males who are exposed to high levels of testosterone before birth are twice as likely to experience delays in language development compared to females. The research, published ...
Medicine & Health / Psychology & Psychiatry
Jan 26, 2012 |
not rated yet |
0
|
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 |
4.4 / 5 (5) |
0
|
In birds, masters of illusion are lucky in love
Many male birds use their flashy colored feathers to lure females, but the great bowerbird of Australia has mastered the art of illusion to captivate the ladies, researchers said Thursday.
Jan 19, 2012 |
not rated yet |
1
Male
Male (♂) refers to the sex of an organism, or part of an organism, which produces small mobile gametes, called spermatozoa. Each spermatozoon can fuse with a larger female gamete or ovum, in the process of fertilization. A male cannot reproduce sexually without access to at least one ovum from a female, but some organisms can reproduce both sexually and asexually.
Not all species share a common sex-determination system. In humans and most animals, sex is determined genetically but in other species it can be determined due to social, environmental, or other factors. The existence of two sexes seems to have been selected independently across different evolutionary lineages (see Convergent Evolution). Accordingly, sex is defined operationally across species by the type of gametes produced (ie: spermatozoa vs. ova) and differences between males and females in one lineage are not always predictive of differences in another.
Male/Female dimorphism between organisms or reproductive organs of different sexes is not limited to animals; male gametes are produced by chytrids, diatoms and land plants, among others. In land plants, female and male designate not only the female and male gamete-producing organisms and structures but also the structures of the sporophytes that give rise to male and female plants.
For more information about Male, read the full article at
Wikipedia.
This text uses material from Wikipedia and is available under the GNU Free Documentation License.
