Yintoni chromatid? chromatids Education

Yintoni chromatid? division Cell kubalulekile ukuba ubomi kumzimba multicellular. Ekugqibeleni, siye sonke wadala ukusuka kwiseli enye, ezo kwakhona kwaye kwakhona. Ngethuba lale nkqubo, kunye ngumongo njengoko kukho iinguqu ezithile iiseli eukaryotic, leyo ibizwa ngokuba mitosis kunye meiosis. Chromatids - ikopi zofuzo ukuba badalwa phambi ngokucandeka yenyukliya.

Ukwahluka ngaphakathi iintlobo

Xa kuziwa zazivelela, iyantlukwano zofuzo na wabalasela. Xa meiosis (inkqubo ngokucandeka yenyukliya) ukuyilwa iiseli gamete haploid - isidoda iqanda. iyantlukwano zeemvelo kwandisa kumacala ezimbini eziphambili. Okokuqala, lo zofuzo homologous yahlulwe ngokungakhethiyo kwizisele intombi, ngoko kukho indibaniso ezininzi kunokwenzeka zofuzo koomama kunye zooyise. recombination Homologous (utshintshiselwano ulandelelwano) wesibini indlela ukwandisa iyantlukwano yemfuza.

Yintoni chromatids: Inkcazo

Ngexesha division iseli zifane aba, kunye nezinye kwingingqi ebizwa ngokuba centromere. Xa wacofa chromatids udade yahlukanisiwe ukusuka kwenye nenye kwi anaphase of mitosis, ngamnye kubo ufumana igama elitsha - ezi zofuzo intombi. Yintoni a chromatid eziphilayo? Lahamba ethetha, yenye zixhobo nucleoprotein 2 ezenziwa ukuliphinda zofuzo oko kwenzeka ngexesha hlula cell. Bona ke isiqingatha iikopi ezimbini twatse zofuzo lwenziwe.

chromatids Education

Chromatin - DNA leyo wawusongwe iiproteni, kanjalo bakha imicu zikhula. Oku kuvela kubo, ebumba chromatid. Phambi ukuphindaphindeka chromosome ivela njenge chromatids-balahleke single. Emva ukuphindaphindeka, kuba kakuhle ngabo bonke X-ezimile. Iseli nganye yabantu iqulethe 23 ngezibini chromosome, abe inani elipheleleyo 46 zofuzo.

isiphelo

Chromatid wabiza omnye iikopi ezimbini kwemolekyuli DNA kunye okumisele a chromosome ukuba baphinda ngaphambili, kwaye lidibane kummandla owaziwa ngokuba centromere. Eli gama lisetyenziswa gama nje ezi centromeres efanayo ahlale contact ngqo. Xa zofuzo bohlulwa ngexesha anaphase of meiosis okanye mitosis, i chromatids filamentous babe ngabantwana zofuzo. Ngamafutshane, oku yenza zofuzo lwenziwe.