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  • Understanding Sex-Linked Genes on X and Y Chromosomes
    Genes carried on the X and Y chromosomes are called sex-linked genes.

    Here's why:

    * Sex Chromosomes: These are the chromosomes that determine an individual's sex. Females have two X chromosomes (XX), while males have one X and one Y chromosome (XY).

    * Sex-Linked Genes: These genes are located on the X or Y chromosome. Because these chromosomes are involved in sex determination, the traits controlled by these genes are often linked to sex.

    Examples of Sex-Linked Traits:

    * Red-green color blindness: This condition is caused by a recessive gene on the X chromosome.

    * Hemophilia: This blood clotting disorder is also caused by a recessive gene on the X chromosome.

    * Duchenne muscular dystrophy: This muscle-wasting disease is caused by a recessive gene on the X chromosome.

    * Sry gene: This gene on the Y chromosome is responsible for triggering the development of male characteristics.

    Important Note: Since males only have one X chromosome, they are more likely to inherit sex-linked recessive traits than females. This is because females have two X chromosomes, so they can have a dominant allele on one X chromosome to compensate for a recessive allele on the other.

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