Which of the following statements are correct | vedclass

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(D) Klinefelter's syndrome is a genetic disorder caused by the presence of an additional copy of the $X$-chromosome,resulting in a karyotype of $47, X

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$B$ and $E$ only

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(D) Klinefelter's syndrome is a genetic disorder caused by the presence of an additional copy of the $X$-chromosome,resulting in a karyotype of $47, XXY$.Statement $B$ is correct because individuals with this syndrome exhibit overall masculine development,but they also show some feminine characteristics (such as gynaecomastia).Statement $E$ is correct because these individuals are sterile.Statements $A$,$C$,and $D$ are incorrect because they describe features associated with Down's syndrome,not Klinefelter's syndrome. Down's syndrome was first described by Langdon Down in $1866$,and affected individuals are typically short-statured with retarded physical,psychomotor,and mental development.Therefore,statements $B$ and $E$ are correct.

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