Meiosis tshwm sim hauv cov kab mob primordial, cov hlwb tau teev tseg rau kev sib deev thiab cais tawm ntawm lub cev lub cev somatic. Nyob rau hauv kev npaj rau meiosis, ib tug kab mob cell mus los ntawm interphase, thaum lub sij hawm uas tag nrho cov cell (xws li cov noob caj noob ces muaj nyob rau hauv lub nucleus) undergoes replication.
Meiosis tshwm sim nyob qhov twg thiab thaum twg hauv tib neeg?
Hauv tib neeg, meiosis yog cov txheej txheem uas cov phev hlwb thiab qe qe raug tsim. Hauv txiv neej, meiosis tshwm sim tom qab puberty. Diploid cells nyob rau hauv cov qog ntshav meiosis los tsim cov phev haploid nrog 23 chromosomes. Ib leeg diploid cell yields plaub haploid phev hlwb los ntawm meiosis.
meiosis yog dab tsi thiab nws tshwm sim nyob qhov twg?
Meiosis yog txheej txheem uas ib lub xov tooj sib faib ob zaug los tsim plaub lub hlwb uas muaj ib nrab ntawm cov ntaub ntawv keeb kwm yav dhau los . Cov hlwb no yog peb cov poj niam cev xeeb tub - phev hauv txiv neej, qe hauv poj niam. Thaum lub sij hawm meiosis ib cell? faib ob zaug los ua plaub tus ntxhais.
Meiosis tshwm sim hauv cell dab tsi?
Kev faib tshwj xeeb ntawm chromosomes hu ua meiosis tshwm sim thaum lub sijhawm tsim cov qe menyuam, lossis gametes, ntawm cov kab mob sib deev. Gametes xws li ova, phev, thiab paj ntoos pib ua cov kab mob, uas, zoo li lwm hom hlwb, muaj ob daim ntawv luam ntawm txhua tus noob hauv lawv cov nuclei.
mitosis thiab meiosis tshwm sim nyob qhov twg?
Mitosis tshwm sim hauv cov hlwb somatic; Qhov no txhais tau hais tias nws yuav siv qhov chaw nyob rau hauv txhua hom hlwb uas tsis koom nrog hauv kev tsim cov gametes. Ua ntej txhua qhov kev faib mitotic, ib daim qauv ntawm txhua tus chromosome yog tsim; Yog li, tom qab kev faib tawm, ib pawg ua tiav ntawm chromosomes pom nyob rau hauv lub nucleus ntawm txhua lub cell tshiab.
