Thaum lub sijhawm prophase I thiab metaphase I ntawm meiosis, chromosome muaj tetrad (4 chromatids lossis 4 DNA molecules) thiab txo mus rau ob chromatids (2 DNA molecules) los ntawm lub sij hawm metaphase II tshwm sim.
Puas muaj pes tsawg chromosomes nyob rau hauv metaphase ntawm mitosis?
Metaphase: Thaum lub sijhawm metaphase, txhua tus 46 chromosomes kab nyob rau hauv nruab nrab ntawm tes ntawm lub phaj metaphase.
Chromosomes thaum lub sijhawm metaphase yog dab tsi?
Thaum lub sijhawm metaphase, lub cell's chromosomes kho lawv tus kheej hauv nruab nrab ntawm lub xovtoojlos ntawm ib hom cellular "tug of war." Cov chromosomes, uas tau rov ua dua thiab tseem koom nrog ntawm qhov chaw nruab nrab hu ua centromere, hu ua tus muam chromatids.
Yuav ua li cas cov chromosomes hauv ib lub cell ntawm metaphase ntawm mitosis?
Metaphase. Chromosomes kab ntawm lub phaj metaphase, nyob rau hauv nro los ntawm mitotic spindle. Lub obtus muam chromatids ntawm txhua tus chromosome raug ntes los ntawm microtubules los ntawm cov ncej ntxaiv. Hauv metaphase, lub spindle tau ntes tag nrho cov chromosomes thiab lined lawv nyob rau hauv nruab nrab ntawm tes, npaj los faib.
Puas muaj pes tsawg chromosomes thiab chromatids nyob hauv metaphase ntawm mitosis?
Ib yam li ntawd, hauv tib neeg (2n=46), muaj 46 chromosomes tshwm sim thaum lub sijhawm metaphase, tab sis 92 chromatids. Nws tsuas yog thaum tus muam chromatids sib cais - ib kauj ruam qhia tias anaphase tau pib - tias txhua tus chromatid raug suav tias yog ib tus neeg chromosome.
