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chromosomal disorder |
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chromosomal disorderSyndrome caused by chromosome abnormality. Normally, humans have 23 pairs of chromosomes, including one pair of sex chromosomes. Any variation from this pattern causes abnormalities. A chromosome may be duplicated (trisomy) or absent (monosomy); one or more extra full sets of chromosomes can be present (see ploidy); or part of a chromosome may be missing (deletion) or transferred to another (translocation). Resulting disorders include Down syndrome, intellectual disability, heart malformation, abnormal sexual development, malignancies, and sex-chromosome disorders (e.g., Turner syndrome, Klinefelter syndrome). Chromosomal disorders occur in 0.5% of births; many can now be diagnosed before birth by amniocentesis. How to thank TFD for its existence? Tell a friend about us, add a link to this page, add the site to iGoogle, or visit webmaster's page for free fun content. |
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The most striking and easily identified behavioral manifestations of the chromosomal disorder are an intense preoccupation with food and marked abnormalities in satiety (Dykens, Leckman, & Cassidy, 1996; Zellweger, 1984). For certain chromosomal disorders such as Down's syndrome, the unfortunate answer is yes. Down Syndrome, Patau Syndrome and other chromosomal disorders |
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