X chromosome yog ntau shapeless tshaj X-shaped Tib neeg, peb paub, muaj 23 khub ntawm chromosomes nyob rau hauv txhua lub cell, suav nrog ib khub ntawm kev sib deev chromosomes: poj niam muaj ob X. chromosomes, thiab txiv neej muaj ib tug X thiab Y chromosome. Dab tsi tsis paub zoo yog tias X chromosome tsis zoo li "X. "
Vim li cas chromosome X zoo li tus?
Vim tias txhua qhov sib npaug ntawm chromosome muaj ob tus viv ncaus zoo tib yam chromatids koom nrog ntawm qhov chaw hu ua centromere, cov qauv no tam sim no tshwm sim li lub cev X-zoo li thaum saib hauv lub tshuab tsom. Ob peb DNA binding proteins catalyze cov txheej txheem condensation, suav nrog cohesin thiab condensin.
Cov duab ntawm chromosome yog dab tsi?
Chromosomes - 46 cov pob ntim nruj ntawm cov khoom siv caj ces hauv peb lub hlwb - yog lub cim qhia raws li X-puab formations. Txawm li cas los xij, cov X zoo nkauj tsuas yog tshwm sim thaum lub cell tab tom yuav sib faib thiab tag nrho cov ntsiab lus ntawm nws cov genome duplicated.
X zoo li tus chromosome hu ua dab tsi?
Chromosomes yog tsim los ntawm ib qho DNA uas muaj kev sib koom siab heev. Cov chromosomes replicated muaj ib tug X zoo thiab hu ua viv ncaus chromatidsTus muam chromatids yog khub ntawm cov ntawv luam zoo tib yam ntawm DNA koom ntawm qhov chaw hu ua centromere. Tom qab ntawd, tus qauv hu ua mitotic spindle pib tsim.
2 tug ntxhais yog dab tsi?
Key Takeaways. Cov menyuam ntxhais yog cov hlwb uas tshwm sim los ntawm ib qho kev faib niam txiv cell. Ob lub hlwb yog qhov kawg tshwm sim los ntawm cov txheej txheem mitoticthaum plaub lub hlwb yog qhov kawg tshwm sim los ntawm cov txheej txheem meiotic. Rau cov kab mob uas yug me nyuam los ntawm kev sib deev, cov ntxhais cell tshwm sim los ntawm meiosis.
