Citations:Klinefelter


 * 1976, George W. Burns, The Science of Genetics: An Introduction to Heredity
 * Klinefelters are sex chromatin positive; the karyotype shows 47 chromosomes, i.e., 47, XXY. The XXY individual may arise through fertilization of an XX egg by a Y sperm, or through fertilization of an X egg by an XY sperm.
 * 1978, K. H. Sit, A Primer in Human Genetics: The Genetic Links Between You and Your Family
 * Psychological characteristics : Most Klinefelters are just below average in intelligence.
 * 2012, Laura L. Gould, Cats are not Peas: A Calico History of Genetics, Springer Science & Business Media (ISBN 9781468463132), page 169:
 * It&#39;s been two years since the discovery that human Klinefelters are XXY, and the authors, Thuline and Norby, offer evidence that the male calicos are their ...
 * 2015, Shio Kumar Singh, Mammalian Endocrinology and Male Reproductive Biology, CRC Press (ISBN 9781498727365), page 301:
 * 10% of Klinefelters are mosaics having a karyotype, 46,XY/47,XYY/47,XXY or ...