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Klinefelter's Syndrome ¡q«ÝĶ¡r
This is the case of non-disjunction of the sex chromosome.
Patients of the Klinefelter's syndrome have three sex chromosomes as XXY. They are outwardly normal males, but the testes are always small after puberty. They are usually sterile and have breasts developed, feminine-pitched voices and long limbs. Low intelligence is commonly found among the affected individuals.
It was reported in a research of the inheritane of the prisoners in U.S. federal prisons, the ratio of having the genotype XYY is extraordinarily high. This may indicate that individuals having this genotype would have an extra high tendency of making violence offences.
(06.08.2008)