Yuav ua li cas chromosomes nyob rau hauv metaphase I ntawm meiosis?
Yuav ua li cas chromosomes nyob rau hauv metaphase I ntawm meiosis?

Video: Yuav ua li cas chromosomes nyob rau hauv metaphase I ntawm meiosis?

Video: Yuav ua li cas chromosomes nyob rau hauv metaphase I ntawm meiosis?
Video: 5 Yam: Txhob pub muaj nyob hauv Tsev (Tsis Zoo) 2024, Kaum ib hlis
Anonim

Hauv metaphase Kuv, homologous khub ntawm chromosomes sib npaug ntawm ob sab ntawm daim phiaj equatorial. Tom qab ntawd, nyob rau hauv anaphase I, cov spindle fibers cog lus thiab rub cov homologous khub, txhua tus nrog ob chromatids, deb ntawm ib leeg thiab mus rau txhua tus ncej ntawm tes.

Ua raws li qhov no hauv kev txiav txim siab, ua li cas chromosomes sib dhos thaum lub sijhawm metaphase?

Thaum lub sij hawm metaphase , lub cell chromosomes sib npaug lawv tus kheej nyob rau hauv nruab nrab ntawm lub cell los ntawm ib hom cellular "tug ntawm tsov rog." Cov chromosomes , uas tau rov ua dua thiab tseem koom nrog ntawm qhov chaw nruab nrab hu ua centromere, yog hu ua muam chromatids.

Tom qab ntawd, lo lus nug yog, qhov sib txawv ntawm chromosomes txawv li cas ntawm metaphase ntawm mitosis thiab metaphase ntawm meiosis 1? Metaphase ntawm mitosis kab nyob rau ntawm kab zauv ntawm cov hlwb raws li ib tug neeg chromosomes . Metaphase ntawm meiosis 1 lawv kab ua khub.

Xav txog qhov no, yuav ua li cas thaum lub sijhawm metaphase I ntawm meiosis?

Hauv metaphase 1 ntawm meiosis , bivalents orient ntawm lub metaphase phaj thiab homologous yog khub. Txhua chromosome ntawm ib khub homologous txuas mus rau fibers los ntawm opposite ncej. Tus muam chromatids txuas rau fibers los ntawm tib tus ncej. Qhov no yog kev sib cais ntawm tus muam chromatids.

Muaj pes tsawg chromosomes nyob rau hauv metaphase 1 ntawm meiosis?

46 chromosome ua

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