Video: Dab tsi yog hauv chromatid?
2024 Tus sau: Miles Stephen | [email protected]. Kawg hloov kho: 2023-12-15 23:36
A chromatid (Greek khrōmat- 'xim' + -id) yog ib qho chromosome uas tau muab luam tawm tshiab los yog cov ntawv luam ntawm cov chromosome, ob leeg tseem koom nrog cov chromosome qub los ntawm ib lub centromere. Ua ntej replication, ib chromosome yog tsim los ntawm ib tug DNA molecule. Hauv metaphase, lawv hu ua chromatids.
Tsis tas li ntawd, chromatid muaj dab tsi?
A chromatid yog replicated chromosome muaj ob tug ntxhais strands koom los ntawm ib tug tib centromere (ob strands sib cais thaum lub cell faib los ua ib tug chromosomes).
Tsis tas li ntawd, tus chromatid zoo li cas? A chromatid yog ib nrab ntawm ob daim ntawv luam zoo ib yam ntawm cov chromosome replicated. Thaum lub sijhawm faib cell, cov ntawv luam zoo ib yam tau koom ua ke ntawm thaj tsam ntawm chromosome hu ua centromere. Koom nrog chromatids hu ua muam chromatids . A chromatid yog ib nrab ntawm ob daim ntawv luam zoo ib yam ntawm cov chromosome replicated.
Tsuas yog li ntawd, chromatid thiab chromosome 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 chaw nyob . Cov chromatids muaj cov khoom hu ua chromatin.
Lub luag haujlwm ntawm chromatid yog dab tsi?
Ib qho chromatid yog ib qho luam ntawm ib tug tshiab chromosome uas yog tseem koom nrog tus thawj luam los ntawm ib tug centromere. Nws lub luag haujlwm tseem ceeb yog pom nyob rau lub sijhawm me me nws tseem nyob, hauv mitosis thiab meiosis, vim nws ua haujlwm kom zoo DNA. suav qhov twg nws yuav tsum tau.
Pom zoo:
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Chromosomes muaj cov DNA molecules nruj nreem kaw thaum nyob rau hauv cov ntaub ntawv ntawm chromatids, DNA molecules yog unwound. Ib chromosome yog tsim los ntawm ib leeg, ob-stranded DNA molecule thaum lub chromatid muaj ob DNA strands koom ua ke los ntawm lawv cov centromere. Cov chromatids muaj ib yam khoom hu ua chromatin