Turner syndrome is typically associated with which chromosomal configuration?

Enhance your knowledge of cell division for the Alberta Biology 30 exam with multiple-choice questions and detailed explanations. Prepare confidently for your test!

Multiple Choice

Turner syndrome is typically associated with which chromosomal configuration?

Explanation:
Turner syndrome occurs when there is only one sex chromosome present, an X, with no second sex chromosome. In karyotype terms this is monosomy X, usually written as 45,X. Without a second X or a Y, individuals are almost always female and often have characteristics such as short stature and gonadal dysgenesis, which can lead to infertility if not treated. Some Turner cases are mosaic, meaning some cells are 45,X while others are 46,XX, but the classic association is monosomy X. Other chromosomal configurations don’t match Turner: having an extra X chromosome (XXX) is Triple X; having an extra sex chromosome in a male (XXY) is Klinefelter; a typical XY set is a normal male.

Turner syndrome occurs when there is only one sex chromosome present, an X, with no second sex chromosome. In karyotype terms this is monosomy X, usually written as 45,X. Without a second X or a Y, individuals are almost always female and often have characteristics such as short stature and gonadal dysgenesis, which can lead to infertility if not treated. Some Turner cases are mosaic, meaning some cells are 45,X while others are 46,XX, but the classic association is monosomy X. Other chromosomal configurations don’t match Turner: having an extra X chromosome (XXX) is Triple X; having an extra sex chromosome in a male (XXY) is Klinefelter; a typical XY set is a normal male.

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