News tagged with sex
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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.
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(HealthDay)—Danish scientists testing a novel HIV treatment in human trials contend that they're confident their strategy will result in a cure for the AIDS-causing virus, according to news reports.
HIV & AIDS Apr 29, 2013 | 5 / 5 (1) | 0
Female rats are much more likely to binge eat than male rats, according to new research that provides some of the strongest evidence yet that biology plays a role in eating disorders.
Diseases, Conditions, Syndromes May 01, 2013 | 5 / 5 (1) | 0
What is the reason for the widely reported fact that men are more likely than women to die of cancer? New evidence from population studies suggests that free testosterone could be a key driver of cancer aggressiveness in ...
Cancer May 14, 2013 | 5 / 5 (1) | 0