Health Disease Mental Smoking Drugs. Laws Homosexuality laws Civil union California ban. Homosexuality is the condition of "sexual desire or behavior directed toward a person or persons of one's own sex. Homosexuality has a number of causal factors that influence its origination in individuals; these factors will be addressed shortly. In addition, homosexuality has a variety of effects on individuals and society.
A 'gay Gene?' - Is Homosexuality Inherited? | Assault On Gay America | FRONTLINE | PBS
A new study suggests many genes, each with small effects, may play a role in same-sex sexual behavior. People who have had same-sex partners are more likely to have one or more of certain DNA markers, according to the largest ever search for genes linked to sexual orientation. Even all the markers taken together, however, cannot predict whether a person is gay, bisexual, or straight. Instead, hundreds or thousands of genes, each with small effects, apparently influence sexual behavior.
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Born this way? Society, sexuality and the search for the 'gay gene'
Bill Sullivan does not work for, consult, own shares in or receive funding from any company or organisation that would benefit from this article, and has disclosed no relevant affiliations beyond their academic appointment. In the U. Despite these numbers, many people still consider homosexual behavior to be an anomalous choice. However, biologists have documented homosexual behavior in more than species , arguing that same-sex behavior is not an unnatural choice, and may in fact play a vital role within populations. In a issue of Science magazine , geneticist Andrea Ganna at the Broad Institute of MIT and Harvard, and colleagues, described the largest survey to date for genes associated with same-sex behavior.
Notablemente se consideran tres orientaciones sexuales principales, la heterosexualidad, la homosexualidad y la bisexualidad. La heterosexualidad se establece como un modelo social percibido en las nociones tradicionales de la familia , la sexualidad y el matrimonio. Al igual que la homosexualidad, la bisexualidad se manifiesta como un comportamiento sexual natural en diversas especies animales.