Nyob hauv tib neeg, poj niam txais tau an X chromosome los ntawm leej niam leej txiv, whereas txiv neej ib txwm txais lawv X chromosome los ntawm lawv niam thiab lawv Y chromosome los ntawm lawv txiv.
Puas yog poj niam chromosome XY?
X chromosome yog ib qho ntawm ob qho kev sib deev chromosome. Tib neeg thiab tsiaj txhu feem ntau muaj ob lub chromosomes kev sib deev, X thiab Y.
Cov poj niam puas tuaj yeem muaj Y chromosomes?
Txhua tus neeg ib txwm muaj ib khub ntawm kev sib deev chromosomes hauv txhua lub cell. Y chromosome muaj nyob rau hauv cov txiv neej, uas muaj ib tug X thiab ib tug Y chromosome, thaum poj niam muaj ob X chromosomes..
poj niam chromosomes hu ua dab tsi?
Poj niam muaj ob X chromosomes, hos txiv neej muaj ib X thiab ib Y chromosome. Thaum ntxov nyob rau hauv embryonic txoj kev loj hlob nyob rau hauv cov poj niam, ib tug ntawm ob lub X chromosomes yog randomly thiab mus tas li inactivated nyob rau hauv lub hlwb uas tsis yog qe qe. Qhov tshwm sim no hu ua X-inactivation lossis lyonization.
Puas muaj poj niam los txiv neej?
Txiv neej nrog XYY syndrome muaj 47 chromosomes vim yog Y chromosome ntxiv. Cov mob no kuj qee zaum hu ua Jacob's syndrome, XYY karyotype, lossis YY syndrome. Raws li National Institutes of He alth, XYY syndrome tshwm sim hauv 1 ntawm txhua 1,000 tus tub.
