Male or female – over 500 species of fish can change even in adulthood. Also, for the people: The gender is not specified always as clear as we think.
In the coral reefs of the Caribbean, swarms of yellow swim blue head-Junker-females. The name of the species from the blue head of the single male in the swarm has. The male dies, the largest female turns into a new male. In ten minutes it changes its behavior, in ten days the whole of his gender. Without anything to change in the genes, it gets a blue head and testicles, his ovaries are.
A team of researchers from Australia, new Zealand and the USA found that in these situations, a chemical Signal is secreted, the specific genes in the fish enabled and the other disabled. Around 500 species of fish can change their gender in adulthood.
Also, some reptiles can change as the Embryo in the Egg of their gender. At a certain temperature, the females hatch in a other males. The change in temperature activates or deactivates certain genes.
In mammals is still not a natural gender has been shown to change. However, studies with mice show that When researchers activate certain genes of the animals, can transform testicular cells into ovarian cells.
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Born in the wrong body
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Born in the wrong body
Gender is more complicated than I thought
Also in humans, the male and female gender are not always clearly delineated. Basically, it is the male XY chromosomes and the female XX chromosome pair. However, this does not determine alone the gender.
Meaning, in addition to the chromosomes and the genes, hormones and receptors, as well as the testicles, ovaries and the outer genitals, says Heinz-Jürgen Voss, a biologist and social scientist of the University of applied Sciences Merseburg. Scientists assume that about 1000 genes, which can have an influence on the gender.
These parameters are not always female or male. Biologists speak of a spectrum, in which only male or only female characteristics are. There are people who have XY chromosomes and still have female sex characteristics. This can lead to deviations, which are often not even noticed.
Surgeons in the Indian Kashmir, for example, report in the “Journal of surgery case studies” of the Operation of an inguinal hernia, in which they found a 70-Year-old both a uterus as well as fallopian tubes. The father of four children, had known nothing of it. There are people with XX chromosomes, the outer of the male genital parts and testes.
However, there are rare people that sticks testes and ovaries, a uterus and a prostate and a Penis and a Vagina have.
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The invention of the sexes
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The invention of the sexes
Not male, not female – then what?
People for whom the gender is not in all of the parameters, clearly, be described as intersex. Experts from 0.05 to 1.7 percent of the population, depending on the Definition and estimation. If a Person is intersex, this means not automatically that she’s attracted to both sexes hung. Inter-does not mean sexually, the Same as a transsexual. Transsexuals have a clear biological gender, but feel like you don’t have to be in the “right” body.
About 1900 operations, plus many years of hormone treatments are carried out in Germany each year, under ten years of inter-sexual children, to give them a clear gender to assign. The number has not decreased since 2005, says sociologist Ulrike Klöppel. The exact number of operated children is not known. “However, many people struggle later in life with the assigned sex and can’t insert a still into one of two categories,” says Voss.
The gender is not always clearly male or female. Land in Germany since the 1. January 2019 to let the gender of “Divers” to enter. Previously, it was allowed since 2013, only to let in a newborn, the gender designation is open. In 2017, the Federal constitutional court ruled that this Situation is contrary to the personal law and the prohibition of discrimination.
Heinz-Jürgen Voß wishes, that, as in Argentina, Malta and Pakistan, people of your sex itself can indicate, without a prior medical examination.When so many different factors affect the gender, whether it is their perceived gender identity the strongest Parameter, says Voss: “You should just ask every person for themselves.”
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10 animal species that demonstrate that homosexuality is naturalGiraffes during foreplay
In the case of giraffes-sex mating is the rule. 90 percent of all observed sexual activities with partners of the same sex. The animals, however, are not always directly to the point. Male giraffes rubbing often gently their necks on the body of the other along. This foreplay can take up to an hour – and sometimes leads directly to the climax.
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10 animal species that demonstrate that homosexuality is naturalOral sex with dolphins
In the case of bottlenose dolphins show both female as well as male homosexual behavior. This includes oral sex, in which one Dolphin stimulates the other with the muzzle belongs to. In the world of the bottlenose dolphins of same-sex Sex is as common as heterosexual couples. Males are generally bisexual, but they go through stages in which they only with other males for pleasure.
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10 animal species that demonstrate that homosexuality is naturalIn the cave of the lion
Even the kings of animals are gay active. Two to four males often form a community that makes together the lionesses of the yard. They are dependent on each other and will jointly distribute groups of other lions. Your Federal consolidate them by, they have Sex with each other. Researchers call this an intimate men’s relationship, instead of a classic homosexual relationship.
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10 animal species that demonstrate that homosexuality is naturalThe lack of women
In the case of the American bison Sex between men is more common than heterosexual matings. The reason: The females mate with the bulls only once in a year. Anyone who feels the urge, when no female is available, has fun with another male. About half of the climbing young bison meets another guy.
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10 animal species that demonstrate that homosexuality is naturalMacaques and the One-Night-Stand
Matings with the same gender also like the macaques. Males, however, sufficient for a night of gay pleasure. Females, however, are usually monogamous, and develop close relationships with other females. They sleep close to each other, cleaning themselves and defend the other against enemies.
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10 animal species that demonstrate that homosexuality is naturalAlbatross bond for life
Also, the Laysan Albatross, which breeds on Hawaii, same-sex matings are known. 30 percent of all the couples on the island of Oahu are a lesbian couple. They are monogamous and usually mate for life. Their eggs from males from other partnerships fertilize. For the fertilized Egg and the chick the two women together.
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10 animal species that demonstrate that homosexuality is naturalHorny Bonobos
Bonobos are the closest Relatives of people. Your Motto: love instead of war. Do you often have Sex, even with other dogs of the same sex. That’s what makes them fun, but also helps you, the social ladder to climb up and release the tensions. Two-thirds of all homosexual activity between females. But also males together, frolicking in the Grass.
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10 animal species that demonstrate that homosexuality is naturalHomosexual swans start a family
Like many other bird species remain swans for a lifetime with the same Partner. And that can be quite a same-sex Partner. About 20 percent of all Swan are gay couples – and together reasons, still families. A male mates with a female, and distributes them, as soon as she has laid eggs. Or the gay couple adopted an abandoned egg.
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10 animal species that demonstrate that homosexuality is naturalTenderness walruses
Male walruses reach sexual maturity at four years. Until then, almost all of them are gay. After sexual maturity, you are bisexual: they mate during the breeding season, with females and have the Rest of the year to have Sex with males. You are each other but not the only One: The males embrace and sleep closely cuddled together.
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10 animal species that demonstrate that homosexuality is naturalThe preferences of a sheep
In studies, eight percent of male domestic sheep rather chose a goat as a Partner, although sufficiently fertile females were available. Scientists studied the brains of these sheep and found a different brain structure than heterosexual counterparts. Your brain is set free, less sex hormones.