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   How many X chromosomes does a female have?

   • The female has two X chromosomes, and all female egg cells normally carry a single X. The eggs fertilized by X-bearing sperm become females (XX), whereas those fertilized by Y-bearing sperm become males (XY).

   Sex chromosome | Definition, Examples, & Facts | Britannica

   www.britannica.com/science/sex-chromosome

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   Are X chromosomes male or female?

   • Individuals having two X chromosomes (XX) are female; individuals having one X chromosome and one Y chromosome (XY) are male. The X chromosome resembles a large autosomal chromosome with a long and a short arm. The Y chromosome has one long arm and a very short second arm.

   Sex chromosome | Definition, Examples, & Facts | Britannica

   www.britannica.com/science/sex-chromosome

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   What are sex chromosomes?

   • Sex chromosomes are chromosomes that affect your sexual anatomy and reproductive development. Most of us were raised with the idea that there are two sexes: male and female. We’re usually told that people with XY chromosomes are male and people with XX chromosomes are female. It’s a lot more complicated than that.

   Sex Chromosomes: Definition, Purpose, Examples - Healthline

   www.healthline.com/health/sex-chromosomes

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   What is the difference between X & Y sex chromosomes?

   • The eggs fertilized by X-bearing sperm become females (XX), whereas those fertilized by Y-bearing sperm become males (XY). Unlike the paired autosomes, in which each member normally carries alleles (forms) of the same genes, the paired sex chromosomes do not carry an identical complement of genetic information.

   Sex chromosome | Definition, Examples, & Facts | Britannica

   www.britannica.com/science/sex-chromosome

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2. www.britannica.com › science › sex-chromosomeSex chromosome | Definition, Examples, & Facts | Britannica

   www.britannica.com › science › sex-chromosome

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   Learn how the X and Y chromosomes determine biological sex in humans and other mammals. Find out about sex-linked traits, sex chromosome disorders, and polyploidy in plants and animals.

   • Author: The Editors of Encyclopaedia Britannica

3. en.wikipedia.org › wiki › Sex-determination_systemSex-determination system - Wikipedia

   en.wikipedia.org › wiki › Sex-determination_system

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   The XX/XY sex-determination system is the most familiar, as it is found in humans. The XX/XY system is found in most other mammals, as well as some insects. In this system, females have two of the same kind of sex chromosome (XX), while males have two distinct sex chromosomes (XY).

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5. askabiologist.asu.edu › embryo-tales › sex-chromosomesHow Is Your Sex Determined? | Ask A Biologist

   askabiologist.asu.edu › embryo-tales › sex-chromosomes

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   Learn how the X and Y chromosomes carry instructions that decide our biological sex, and how intersex people have both masculine and feminine body parts. Discover the history of how the sex chromosomes were discovered and named by scientists.

6. www.genome.gov › fact-sheets › X-Chromosome-factsX Chromosome - National Human Genome Research Institute

   www.genome.gov › fact-sheets › X-Chromosome-facts

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   Jul 22, 2021 · The twenty-third pair is the sex chromosomes, while the rest of the 22 pairs are called autosomes. Typically, biologically female individuals have two X chromosomes ( XX) while those who are biologically male have one X and one Y chromosome ( XY ). However, there are exceptions to this rule.

7. www.healthline.com › health › sex-chromosomesSex Chromosomes: Definition, Purpose, Examples - Healthline

   www.healthline.com › health › sex-chromosomes

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   Dec 14, 2023 · Learn how sex chromosomes affect your sexual anatomy and reproductive development. Find out about the different types of sex chromosome variations and how they relate to intersex and gender identity.

   • Author: Sian Ferguson

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     X and Y chromosomes explained

     Jan 8, 2019

     126.8K Views

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     13:28

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     XX-XY Sex Determination System | Genetics Ep. 10

     Feb 18, 2021

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     The combination of XX Chromosomes or XY Chromosomes determines a person’s biological sex.

     Jul 23, 2023

     3.9K Views

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9. www.nature.com › scitable › topicpageThe Sex of Offspring Is Determined by Particular Chromosomes

   www.nature.com › scitable › topicpage

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   Learn how scientists discovered and studied the role of sex chromosomes in determining the sex of offspring in different animal species. Explore the diversity of sex determination systems, from the XX-XY system in humans to the ZZ-ZW system in birds.

10. en.wikipedia.org › wiki › Sex_chromosomeSex chromosome - Wikipedia

    en.wikipedia.org › wiki › Sex_chromosome

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    Feminization. Virilization. Sex-determination system. XY. XO. ZW. ZO. Temperature-dependent. Haplodiploidy. Heterogametic sex. Homogametic sex. Sex chromosome. X chromosome. Y chromosome. Testis-determining factor. Hermaphrodite. Sequential hermaphroditism.