Like Down syndrome and other autosomal problems, sex chromosome gross abnormalities can be diagnosed before birth by amniocentesis and chorionic villi sampling. It may be caused by paternal non-disjunction at meiosis II producing a YY sperm or by a post-zygotic event. Many sex differences in vertebrate behavior are established during development by the actions of gonadal steroid hormones Arnold and Gorski, Keywords: sex chromosomes, vasopressin, aggression, parental behavior, Klinefelter syndrome, autism.
Fragile X Syndrome.
Huang et al. This is due to X-inactivation. Table 3. External link. However, there was no contribution of sex chromosome complement, nor was an interaction detected Table 3.
Citing articles via Web of Science Arthur P. Sex chromosome abnormalities are common and cause syndromes that are associated with a range of physical and developmental problems.
The high frequency of people with sex chromosome aberrations is partly due to the fact that they are rarely lethal conditions. Arnold , 2 Paul S. It has an incidence of about male live births. There are 22 pairs of chromosomes that are not sex chromosomes called nonsex chromosomes, numbered chromosomes, or autosomal chromosomes and one pair of sex chromosomes.
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