Vim tias txhua tus chromosome tau muab luam tawm thaum lub sijhawm S, nws tam sim no muaj ob daim ntawv zoo tib yam hu ua sister chromatids uas txuas rau ntawm qhov chaw nruab nrab hu ua centromere.
Yuav ua li cas thaum chromosomes duplicate?
txheej txheem ntawm kev tsim ob lub hlwb tshiab pib ib zaug ib lub xovtooj tau duplicated nws chromosomes. Nyob rau hauv lub xeev no txhua chromosome muaj ib tug sib koom ua ke ntawm zoo tib yam replicas hu ua chromatids. Cov chromosomes condense thiab kab nyob rau hauv nruab nrab ntawm lub nucleus. Lub daim nyias nyias nyob ib puag ncig cov nucleus tawg thiab ploj mus.
Thaum chromosomes duplicate lawv tsim?
Mitosis yog kev faib tawm nuclear thaum lub sijhawm cov chromosomes duplicated thiab faib rau hauv tus ntxhais nuclei. Feem ntau cov cell yuav faib tom qab mitosis nyob rau hauv ib tug txheej txheem hu ua cytokinesis nyob rau hauv uas lub cytoplasm muab faib thiab ob tug ntxhais hlwb tsim.
nws hu li cas thaum chromosomes duplicate?
Chromatid
Thaum lub sijhawm faib cell, cov chromosomes thawj zaug rov ua dua kom txhua tus ntxhais ntawm tes tau txais cov chromosomes tiav. Tom qab DNA rov ua dua, cov chromosome muaj ob lub qauv zoo ib yam hu ua tus muam chromatids, uas tau koom nrog ntawm centromere.
Duplicated Chromosomes - Tales from the Genome
