Below are the list of disorders and a compilation of the information I gathered through internet research and through our class discussion:
1. Turner's Syndrome (XO)
- Receives no sex chromosome from the father, hence it has only one X sex chromosome from the mother
- Affects about 1 in every 2500 females
- Physical abnormalities: short stature, swelling, broad chest, low hairline, low-set ears, and webbed necks
- Ovaries do not develop or function properly (affect girl's sexual development and ability to have children)-->do not go through all the changes associated with puberty (e.g. menstrual cycle)-->infertile
2. Klinefelter's Syndrome (XXY)
- Exist in 1 out of every 650 males
- Have at least 2 X chromosomes and at least 1 Y chromosome
- Hypogonadism and reduced fertility
- Physical abnormalities: Feminine characteristics (larger breasts, less muscular body, less body and facial hair), often taller than other males
3. Super male (XYY)
- Male receives an extra Y chromosome so that he ends up with 47 chromosomes, instead of 46
- Affects 1 out of 1000 males
- Normal sexual development and normal fertility
- Increased risk of learning difficulties, delayed speech and language skills
A Super female is possible where there are 3 X chromosomes. However, as always X chromosomes will be suppressed (which in this case, is 2) so that only one can be expressed.
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