Quote:
Originally Posted by shadowind  i wonder what some one with only one x chromosome would be like, considering woman have 2 x chromosomes and male one x and one y. do you guys know if theres a difference between having only one x chromosome and 2 x? or is there no difference? i have some basic knowledge in genetics but not alot. |
i just learned about this in biology.
nondisjunction occurs when the chromosomes are not separated properly during meiosis, and a person can have an extra chromosome or be missing a chromosome.
turner syndrome is when a person is born with only an X chromosome. they are phenotypically female, but their sex organs do not mature and they're sterile. most have normal intelligence, and they can develop secondary sex charictaristics with estrogen replacement theropy.
Klinefelter sydrome is when the male has XXY. they have sex organs, but the testes are abnormally small, and they are also sterile. they usually develope slight breasts and other feminine characteristics.
XXX females show no difference from XX females. XYY males also show no difference from XY males (except sometimes they are taller than average). i think it is impossible to have a Y only male (at least i havn't read anything on it).