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There are two kinds of sex chromosomes Listed are the differences between xx and xy chromosomes. Sex chromosomes decide whether you’re biologically male (xy) or female (xx), but they don’t define your gender.
In the xx/xy system, karyotypic females usually have two x chromosomes (xx), while karyotypic males usually have a single x and a single y chromosome (xy). Xx and xy chromosomes are two types of sex chromosomes that determine the biological sex of an individual in many species, including humans In humans the sex chromosomes consist of one pair of the total of 23 pairs of chromosomes
The other 22 pairs of chromosomes are called autosomes
Individuals having two x chromosomes (xx) are female Individuals having one x chromosome and one y chromosome (xy) are male. If the sperm that fertilises the egg carries an x, the baby will have two x chromosomes (xx), typically developing as female If the sperm carries a y, the baby will have one x and one y chromosome (xy), typically developing as male.
People usually have two sex chromosomes Typically, embryos with one x and one y chromosome develop into males And those with two x chromosomes usually become females We get one sex chromosome from our fathers, carried by sperm, and one from our mothers, carried by the egg.
Genotypic sex is focused on the individual’s sex chromosomes, x and/or y and the genes involved
Phenotypic sex considers an individual’s internal and external genitalia As we will see in this section, natural variation for genotypic sex and phenotypic sex exists in humans. In humans, females have two x chromosomes (xx), while males have one x and one y chromosome (xy) The presence of a y chromosome determines maleness
Several genes on the x chromosome are critical for neurological development and cognitive function. If the sperm carries an x chromosome, the resulting offspring will be female (xx) If it carries a y chromosome, the offspring will be male (xy) The presence of the y chromosome is crucial for male development.
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