Sex chromosomes are the genetic elements that define a person's biological sex. Learn about the XX and XY chromosomes, the sex determination system, and other chromosome combinations.

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 …

2019年8月13日 · The main difference between XX and XY chromosomes is that XX chromosomes are the chromosomes in females whereas XY chromosomes are the chromosomes in males, specifically in organisms with the XY sex-determination system. Furthermore, XX chromosomes occur in homogametic sex while XY chromosomes occur in the heterogametic sex.

The XY sex-determination system is a sex-determination system present in many mammals, including humans, some insects , some snakes, some fish , and some plants (Ginkgo tree). In this system, the sex of an individual usually is determined by a pair of sex chromosomes .

2020年10月26日 · XX and XY with the aforementioned expressions are the most common sex chromosomes and corresponding organs, but they’re not the only ones. Some people have differing sex chromosomes, such as those who are born with an extra X chromosome (XXY) or who are missing an X chromosome (XO).

The XX/XY sex-determination system is likely 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, most females have two of the same kind of sex chromosome (XX), while most males have two distinct sex chromosomes (XY).

除了正常的XX和XY，性染色体也有可能表现为XYY、XXY、XXX、X或XXYY等各种核型。 Turner综合征 （X） 少了条X染色体的女性，称为Turner综合征，核型为（45,XO）。 Turner综合征核型 X染色体缺失或异常，将会引起单倍剂量不足，导致性腺不发育。

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XX/XY: Directed by Austin Chick. With Mark Ruffalo, Maya Stange, Kathleen Robertson, Kel O'Neill. Three friends begin a dangerous three-way relationship that spirals out of control, leading to dire consequences that haunt them ten years later.