Dab tsi yog chromatin chromatids thiab chromosomes?
Dab tsi yog chromatin chromatids thiab chromosomes?

Video: Dab tsi yog chromatin chromatids thiab chromosomes?

Video: Dab tsi yog chromatin chromatids thiab chromosomes?
Video: Yog zoo ces lawv yuav lawm 11/13/2018 2024, Kaum ib hlis
Anonim

Chromatin yog DNA thiab cov proteins uas tsim chromosomes . Chromosomes yog cov cais 'daim' ntawm DNA hauv ib lub cell (ua los ntawm chromatin ). Muam chromatids yog cov khoom zoo ib yam ntawm DNA tuav ua ke los ntawm ib lub centromere thiab rub tawm thaum lub sij hawm cell faib los ua qhov zoo tib yam tshiab chromosomes nyob rau hauv lub hlwb tshiab.

Tsis tas li ntawd, qhov txawv ntawm chromosomes chromatin thiab chromatids yog dab tsi?

Chromosomes muaj nruj packed DNA molecules thaum nyob rau hauv cov ntaub ntawv ntawm chromatids , DNA molecules tsis raug mob. A chromosome yog tsim los ntawm ib leeg, ob-stranded DNA molecule thaum a chromatid muaj ob DNA strands koom ua ke los ntawm lawv cov centromere. Cov chromatids muaj ib yam khoom hu ua chromatin.

Kuj Paub, chromosomes chromatin thiab chromatids cuam tshuam li cas? Teb: Chromatin yog ib tug nyias thread zoo li qauv uas yog tsim los ntawm DNA (deoxy ribonucleic acid) thiab cov proteins los tsim ib tug pas nrig. chromatid . Ob zoo sib xws chromatids txuas mus rau ib lub centromer los ua ib tug chromosome.

Kuj nug, dab tsi yog chromosomes thiab chromatin?

Qhov sib txawv tseem ceeb ntawm chromatin thiab chromosome yog tias chromatin muaj lub unraveled condensed qauv ntawm DNA rau lub hom phiaj ntawm ntim rau hauv lub nucleus whereas chromosome muaj cov qauv condensed siab tshaj plaws ntawm DNA doublehelix rau kev sib cais kom zoo ntawm cov khoom siv caj ces ntawm

Dab tsi yog chromatids hauv biology?

A chromatid yog ib nrab ntawm ib tug replicated chromosome. Ua ntej kev faib ntawm tes, chromosomes tau theej thiab cov ntawv chromosome zoo tib yam koom ua ke ntawm lawv cov centromeres. Koom nrog chromatids hu ua muam chromatids.

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