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Sex chromosomes are the genetic elements that define a person's biological sex Half of sperm contain one x chromosome and half contain one y chromosome Learn about the xx and xy chromosomes, the sex determination system, and other chromosome combinations.
Xx and xy chromosomes are only part of the story All eggs contain one x chromosome Discover how sex chromosomes vary naturally and why biological sex isn't always binary
Learn about dsds and intersex variations.
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). Without an sry, an embryo will develop as a female instead of as a male whether it has a y chromosome or not Beyond the binary there are more than just two possible sexes for which the chromosomes can carry instructions While most people are typical xy males or xx females, many people are intersex.
These categories include 46,xx dsd, involving female virilization (in which a female acquires features associated with male hormones) 46,xy dsd, involving abnormalities in testicular differentiation or testosterone biosynthesis or action Xx, sex reversal, in which the individual is phenotypically male Xy, sex reversal, in which the.
Males have one x and one y chromosome (xy)
The father contributes either an x or a y chromosome through his sperm 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
Females have two x chromosomes (xx)
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