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(A) Klinefelter's syndrome is a genetic disorder caused by the presence of an additional $X$ chromosome,resulting in a karyotype of $47, XXY$.Individu

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Klinefelter's syndrome

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(A) Klinefelter's syndrome is a genetic disorder caused by the presence of an additional $X$ chromosome,resulting in a karyotype of $47, XXY$.Individuals with this syndrome have an overall masculine development but also exhibit gynaecomastia,which is the development of breast tissue in males.These individuals are sterile because the extra $X$ chromosome interferes with normal spermatogenesis.In contrast,Turner's syndrome $(45, XO)$ involves female development with sterility,Down's syndrome is trisomy $21$,and Edward syndrome is trisomy $18$.

In which of the genetic disorders does an individual exhibit overall masculine development,gynaecomastia,and sterility?

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