The Y chromosome is a sex-linked chromosome. Men are XY and women are XX, so only men have a Y chromosome. The Y chromosome is very small and contains few genes. There are few genetic diseases related to genes on Y. A disorder that is caused by the occurrence of genetic material on the Y chromosome. The list of types of Y Chromosome Disorders mentioned below.
Klinefelter syndrome: A rare chromosomal genetic syndrome where the person has XXY chromosomes instead of XY or XX. The person is usually male because of the Y chromosome, but has lower levels of testosterone and may have some female-like features (because there are two X chromosomes). Sterility is a possible complication. The rarer subtype XXXY syndrome may lead to retardation.
Jacobs syndrome: A rare chromosomal genetic syndrome where the male person has an extra Y male chromosome, becoming XYY instead of normal XY (male) or XX (female). The person is male and may be mostly normal, or may suffer from minor features from excess male hormones, such as excess acne being very tall, and in some cases behavioral complaints such aggression.
Intersex conditions: A congenital abnormality of the reproductive and sexual organs which in some cases can make it difficult to determine the sex of the child. There is much debate over who gets to decide what gender the child should be - the child or the parents.
