This case is one example of how the legal system in one country has dealt with the complexities of defining sex and gender and the implications of defining gender and sex. Secondary sexual characteristics Many 47,XXY boys appear to enter puberty normally with a tendency for testosterone concentrations to decline at late adolescence and early adulthood.
A range of structural chromosomal abnormalities result in disease. The Y chromosome is small, carries few genes, and has abundant repetitive sequence, while the X chromosome is more autosome-like in form and content. Balanced rearrangements include inverted or translocated chromosomal regions.
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Parkinson's disease is twice as common in men than in women. An extra chromosome 1 can be fatal to a fetus. Namespaces Article Talk. This is because the male who inherits the recessive allele on his X chromosome has no allele on his Y chromosome to counteract its effects.
Chromosomes are structures within cells that contain DNA and many genes. Minto et al. Jewish Virtual Library - Duisburg, Germany. Contributing to the early view that XYY syndrome men have serious personality disorders was the case of Richard Speck.
Educational services Males with 47,XXY should receive a comprehensive psychoeducational evaluation to assess their areas of strengths and weaknesses. Formal cytogenetic analysis is necessary to make a definite diagnosis, and more obvious differences in physical features tend to be associated with increasing numbers of sex chromosomes.
One study characterized 47,XXY males as timid, immature, and reserved, with difficulty relating to their peer group, whereas other studies described 47,XXY subjects as friendly, kind, helpful, and relates well with other people.
The extra X chromosome in 47,XXY results sporadically from either meiotic nondisjunction where a chromosome fails to separate during the first or second division of gametogenesis or from mitotic nondisjunction in the developing zygote. This is described as mosaic Klinefelter syndrome, and can be described with some variant of mosaic karyotype e.
Chromosomal Abnormalities Almost every cell in our body contains 23 pairs of chromosomes, for a total of 46 chromosomes. You are here: Genomic resource centre. They also are likely to be overweight.