News tagged with sex

Related topics: men

Can science finger a philanderer?

Are people naturally monogamous, polygamous or promiscuous? It's one of those questions that most people feel quite confident in answering. Ask a few people and you're likely to receive a variety of contradictory ...

Feb 11, 2015
popularity 3.5 / 5 (2) | comments 0

'Save your daughters' Modi tells India

Indian Prime Minister Narendra Modi implored his country to stop killing unborn girls on Thursday, warning that its growing gender imbalance would have serious consequences.

Jan 22, 2015
popularity 5 / 5 (3) | comments 0

Sex

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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