: ib qe qe uas tshwm sim los ntawm kev faib meiotic thib ob ntawm ib qho oocyte thiab tsim mus rau hauv lub qe loj.
Dab tsi yog qhov txawv ntawm ootid thiab polar cev?
Lub xovtooj loj dua yog ootid lossis ovum, lossis qe loj; tus me dua yog lub cev qaum teb thib ob. Ootid yog lub zes qe menyuam tsis paub qab hau, tsim tom qab ua tiav ntawm meiosis-II nyob rau hauv theem nrab oocyte, tab sis tsis paub qab hau. … Secondary oocyte yog cov poj niam uas tsis paub tab uas tsis tau ua tiav nws qhov kev faib meiotic.
Qhov txawv ntawm ootid thiab ovum yog dab tsi?
Ootid. Ib qho ootid yog haploid tshwm sim ntawm ootidogenesis. Hauv oogenesis, nws tsis tshua muaj qhov tseem ceeb hauv nws tus kheej, vim nws zoo ib yam li lub zes qe menyuam. … Hauv lwm lo lus, ootid yog lub qe tsis paub tab tsim sai tom qab fertilization, tab sis ua ntej ua tiav maturation rau hauv ovum.
txhais ntawm lub cev polar yog dab tsi?
: ib lub cell uas cais tawm ntawm oocyte thaum lub sij hawm meiosis thiab uas muaj cov nucleus tsim nyob rau hauv thawj los yog thib ob meiotic division thiab tsawg heev cytoplasm.
Vim li cas thiaj hu ua lub cev polar?
Polar cev form vim lub qe cell (oocyte) tsis sib npaug. Cov hlwb uas tshwm sim muaj tib DNA, tab sis ib qho me me, hu ua lub cev polar. … Qhov no yog hom kev faib cell uas ua rau cov hlwb haploid. Lub cell nrog ntau cytoplasm dhau los ua lub zes qe menyuam thaum lub cev polar feem ntau dissolves.
