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Muaj pes tsawg chromosomes muaj chromatid?
Muaj pes tsawg chromosomes muaj chromatid?

Video: Muaj pes tsawg chromosomes muaj chromatid?

Video: Muaj pes tsawg chromosomes muaj chromatid?
Video: Yog muaj 5 yam no ua pes tsawg lub hom phiaj los yeej tiav 2024, Kaum ib hlis
Anonim

Ib yam li ntawd, hauv tib neeg (2n = 46 ), muaj 46 chromosome ua tam sim no thaum 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.

Ib yam li ntawd, muaj pes tsawg chromatids nyob hauv ib chromosome?

ob chromatids

Ib tug kuj yuav nug, yog chromatid yog chromosome? A chromatid (Greek khrōmat- 'xim' + -id) yog ib chromosome uas tau luam tawm tshiab los yog cov ntawv luam ntawm xws li a chromosome , ob leeg tseem koom ua tus thawj chromosome los ntawm ib tug centromere. Ua ntej replication, ib tug chromosome yog tsim los ntawm ib tug DNA molecule.

Ib yam li ntawd, pes tsawg chromatids puas muaj chromosome ua ntej DNA replication?

ob chromatids

Koj suav chromatids li cas?

Cov ntsiab lus tseem ceeb yog

  1. Tus naj npawb ntawm chromosomes = suav cov centromeres.
  2. Tus naj npawb ntawm DNA molecule = suav tus naj npawb ntawm chromatids.
  3. Tus naj npawb ntawm DNA molecule nce tsuas yog thaum DNA replicates uas nyob rau hauv S theem ntawm lub voj voog ntawm tes.
  4. Tus naj npawb ntawm DNA molecules txo qis thaum lub cell faib,

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