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  2. Biology and sexual orientation - Wikipedia

    en.wikipedia.org/wiki/Biology_and_sexual_orientation

    In this way, our gender identity (the conviction of belonging to the male or female gender) and sexual orientation are programmed or organized into our brain structures when we are still in the womb. There is no indication that social environment after birth has an effect on gender identity or sexual orientation."

  3. Causes of gender incongruence - Wikipedia

    en.wikipedia.org/wiki/Causes_of_gender_incongruence

    Gender incongruence is the state of having a gender identity that does not correspond to one's sex assigned at birth. This is experienced by people who identify as transgender or transsexual, and often results in gender dysphoria. [1] The causes of gender incongruence have been studied for decades.

  4. Sexual differentiation in humans - Wikipedia

    en.wikipedia.org/wiki/Sexual_differentiation_in...

    Disruption of typical development may result in the development of both, or neither, duct system, which may produce morphologically intersex individuals. Males: The SRY gene when transcribed and processed produces SRY protein that binds to DNA and directs the development of the gonad into testes. Male development can only occur when the fetal ...

  5. Prenatal hormones and sexual orientation - Wikipedia

    en.wikipedia.org/wiki/Prenatal_hormones_and...

    Drawing on some transsexualism cases, Garcia-Falgueras and Swaab state that "[f]rom these examples it appears that the direct action of testosterone on the developing brain in boys and the lack of such action on the developing brain in girls are crucial factors in the development of male and female gender identity and sexual orientation".

  6. Biopsychosocial model - Wikipedia

    en.wikipedia.org/wiki/Biopsychosocial_model

    The biopsychosocial model of health. Biopsychosocial models are a class of trans-disciplinary models which look at the interconnection between biology, psychology, and socio-environmental factors. These models specifically examine how these aspects play a role in a range of topics but mainly psychiatry, health and human development.

  7. Mutagenesis - Wikipedia

    en.wikipedia.org/wiki/Mutagenesis

    DNA may be modified, either naturally or artificially, by a number of physical, chemical and biological agents, resulting in mutations. Hermann Muller found that "high temperatures" have the ability to mutate genes in the early 1920s, [2] and in 1927, demonstrated a causal link to mutation upon experimenting with an x-ray machine, noting phylogenetic changes when irradiating fruit flies with ...

  8. Gender typing - Wikipedia

    en.wikipedia.org/wiki/Gender_typing

    gender identity: the child recognizes that they are either a boy or a girl and possesses the ability to label others. gender stability: the identity in which they recognizes themselves as does not change; gender consistency: the acceptance that gender does not change regardless of changes in gender-typed appearance, activities, and traits.

  9. Sex differences in psychology - Wikipedia

    en.wikipedia.org/wiki/Sex_differences_in_psychology

    In 1978 Women and sex roles: A social psychological perspective was published, one of the first textbooks on the psychology behind women and sex roles. [15] Another textbook to be published, Gender and Communication, was the first textbook to discuss the topic of its subject. [16] Other influential academic works focused on the development of ...