What disorders are caused from too many or too few sexchromosomes?

Standard male: XY; Standard female: XX

Turner's Syndrome (X): This is a common condition in zygotes, but nearly all of them spontaneously abort (miscarriage). The female has only one X chromosome, is sterile, and has problems with sexual development. Her lifespan and mental functions are unaffected.

Super Female Syndrome (XXX): Many females with this syndrome are unaware of it because the extra X chromosome forms a Barr body and is not used; it is not spontaneously aborted. The female is tall and slender, and she may have a small learning difficulty. Other than that, she appears normal and has no problems.

Klinefelter's Syndrome (XXY): Almost all have infertility; no effect on lifespan; not spontaneously aborted; problems with sexual development at puberty; often a minor impact on mental function; this condition is male-specific due to the presence of the Y chromosome.

Jacob's Syndrome (XYY) (AKA Super Male Syndrome): This male has normal sexual development and fertility. He is very tall, and as a teenager, he may have severe acne and poor coordination. The effects on mental function and social behavior may be minimal at most, but the pregnancy is not spontaneously terminated.

Some disorders caused by abnormal numbers of sex chromosomes include:

1. Klinefelter syndrome (XXY): Too many sex chromosomes (an extra X chromosome).
2. Turner syndrome (X0): Too few sex chromosomes (only one X chromosome).
3. Triple X syndrome (XXX): Too many sex chromosomes (an extra X chromosome).
4. XYY syndrome: Too many sex chromosomes (an extra Y chromosome).
5. XYY mosaic: A mix of cells with normal XY and XYY chromosomes.