Which of the following is common to these four chromosomal abnormalities: Turner's syndrome,Poly-X syndrome,Klinefelter's syndrome,and Supermale syndrome?

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All of the listed syndromes involve an abnormal number of sex chromosomes. In Turner's syndrome, there is only one X chromosome instead of the usual two in females; in Poly-X syndrome, there are extra X chromosomes (usually three or more) in females; in Klinefelter's syndrome, there is an extra X chromosome in males (XXY), and in Supermale syndrome, there is an extra Y chromosome in males (XYY). None of these syndromes involve an extra 21st or 22nd chromosome.

Which of the Following Is Common to These Four Chromosomal