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X and Y Chromosomes

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Among mammals, the gender of an organism is determined by the sex chromosomes. Humans have two sex chromosomes, X and Y. Every human diploid cell has 22 pairs of autosomes and one pair of sex chromosomes. A human female has two X chromosomes, while a male has one X chromosome and one Y chromosome.
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In most organisms, sex is determined by the ratio of X and Y chromosomes. However, in some organisms, such as Drosophila and C.elegans, sex is determined by the ratio of the number of X chromosomes to the number of sets of autosomes. The Y chromosome in Drosophila is active but does not determine sex. It contains genes responsible for the production of sperms in adult flies.
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The Y chromosome is a sex chromosome found in several vertebrates and mammals, including humans. In addition to 22 pairs of autosomes, the human males have one X chromosome and one Y chromosome. In these organisms, the presence or absence of the Y chromosome determines the development of male traits.
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Establishment of Rat Models Mimicking Gender-affirming Hormone Therapies

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Published on: January 10, 2025

Gender Dysphoria and DNA.

Giada Juli¹, Maria Rosaria Juli, Rebecca Juli

¹Psychiatric Studies Center, Iseo, Italy, giadajuli@libero.it.

Psychiatria Danubina

|October 6, 2023

Summary

This summary is machine-generated.

Genetic factors are crucial in gender dysphoria (GD). This review synthesizes molecular genetic studies, exploring genetic variants and heritability linked to GD in transgender individuals.

Keywords:

gender dysphoria - genetic factors – transgender - genetic influence

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Area of Science:

Genetics
Endocrinology
Psychiatry

Background:

Gender dysphoria (GD) involves a discrepancy between natal sex and gender identity, with many individuals identifying as transgender.
Genetic factors are increasingly recognized as significant contributors to the development of GD.
Twin studies suggest a substantial heritability component for gender dysphoria.

Approach:

This review systematically collects and analyzes data from various molecular genetic studies on gender dysphoria.
It focuses on identifying specific genetic variants within candidate genes potentially associated with GD.
The synthesis aims to consolidate current evidence on the genetic underpinnings of gender dysphoria.

Key Points:

Molecular genetic studies investigate the role of specific gene variants in gender dysphoria.
Heritability estimates from twin studies support a significant genetic influence on GD.
Candidate gene approaches are employed to find correlations between genetic markers and GD.

Conclusions:

Genetic factors play a demonstrable role in gender dysphoria.
Further research into specific genetic variants is warranted to understand GD etiology.
Consolidating molecular genetic data provides a foundation for future research into the heritability of gender identity.