Biological sex

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Sex and gender pervade nearly every aspect of our lives. Each time we use a public restroom, shop for clothes, or fill out a form, we are insistently reminded that we must be either male or female; men or women; boys or girls. Even things that ostensibly have nothing to do with sex or gender— what we eatfor example, or the books we read —are often sold to us as if they are necessarily feminine or masculine.

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Whenever a character has no genitals or secondary sex characteristics. They may identify as masculine or feminine, or they may have an entirely different gender identity. This is frequently a trait of spirits and spiritual beingswho don't have physical bodies in the first place.

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This study examined the hypothesis that gender identity and biological sex represent independent modules and that transgender individuals respond to romantic rivals in line with their gender identity and not with their biological sex. Additionally, associations of jealousy with intrasexual competitiveness ISC and social comparison orientation SCO were explored. A total of male-to-female and 94 female-to-male transgender individuals from Greater Buenos Aires, Argentina, responded to a questionnaire.

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She wasn't especially tall. Her testosterone levels weren't unusually high for a woman. She was externally entirely female.

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By Saul McLeodpublished People often get confused between the terms sex and gender. Sex refers to biological differences between males and females.

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Back to Health A to Z. Gender dysphoria is a condition where a person experiences discomfort or distress because there's a mismatch between their biological sex and gender identity. It's sometimes known as gender incongruence.

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Please refresh the page and retry. In mice sperm, when the fast swimmers were gathered and used in IVF, they produced litters that were 90 per cent male. Similarly, when the slower sperm was used, the litters were 81 per cent female. The team from Hiroshima University also told The Telegraph they had successfully used the technique in cattle and produced sex ratios of 90 per cent, although those experiments have not yet been published.

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Organisms of many species are specialized into male and female varieties, each known as a sex. The gametes produced by an organism define its sex: males produce small gametes e. Individual organisms which produce both male and female gametes are termed hermaphroditic.

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The distinction between sex and gender differentiates a person's biological sex the anatomy of an individual's reproductive systemand secondary sex characteristics from that person's genderwhich can refer to either social roles based on the sex of the person gender role or personal identification of one's own gender based on an internal awareness gender identity. In some circumstances, an individual's assigned sex and gender do not align, and the person may be transgender. The sex and gender distinction is not universal. In ordinary speech, sex and gender are often used interchangeably.