Turner syndrome generally results from the presence of a single X chromosome (karyotype 45,X). Which of the following karyotypes corresponds to Turner syndrome?

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Multiple Choice

Turner syndrome generally results from the presence of a single X chromosome (karyotype 45,X). Which of the following karyotypes corresponds to Turner syndrome?

Explanation:
Turner syndrome occurs when there is monosomy X—only one sex chromosome, an X, present in each cell. That single X pattern is what defines Turner. The other patterns describe different conditions or normal sexes: two X chromosomes indicate a standard female, an X and a Y indicate a standard male, and an extra X results in triple X syndrome. So the karyotype with a single X best matches Turner syndrome.

Turner syndrome occurs when there is monosomy X—only one sex chromosome, an X, present in each cell. That single X pattern is what defines Turner. The other patterns describe different conditions or normal sexes: two X chromosomes indicate a standard female, an X and a Y indicate a standard male, and an extra X results in triple X syndrome. So the karyotype with a single X best matches Turner syndrome.

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