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Most cases are caused by nondisjunction errors in paternal meiosis I. Correct answer: Nondisjunction.
One was associated with maternal origin and others with paternal origin. In contrast to other trisomies that originate from errors at maternal meiosis, KS is a notable exception as nearly onehalf of the cases derive from paternal non-disjunction Paternal origin is due to biparental disomy via non-disjunction in meiosis I one paternal and one maternal X chromosome.
This sample originated from a study of phenotypes in individuals with velocardiofacial syndrome with and without autism Diploid cells contain how many times more chromosomes than haploid n cells? Human trisomies compatible with live birth, other than Down syndrome trisomy 21 , are Edwards syndrome trisomy 18 and Patau syndrome trisomy Diploid cells contain two copies of each chromosome, therefore containing twice as many 2n chromosomes as a haploid cell n , which contain only one copy of each chromosome.
Klinefelter's Syndrome [ edit part ] Contents.