Kodi chromatid? chromatids Education

Kodi chromatid? Cell magawano n'kofunika kuti moyo wa multicellular chamoyo. Pomaliza, ife tonse kulengedwa kuchokera selo limodzi lokha, lomwe linagawidwa mobwerezabwereza. Pa ndondomekoyi, ndi phata monga pali kusintha maselo eukaryotic, ndipo amatchedwa mitosis ndi meiosis. Chromatids - buku la DNA kuti zinalengedwa pamaso pa fission nyukiliya.

Masiyanidwe mwa mitundu

Pankhani kusanduka, zosiyanasiyana chibadwa chochititsa chidwi. Mu meiosis (ndondomeko fission nyukiliya) mapangidwe maselo haploid gamete - umuna ndi linagwira. Mitundu yosiyanasiyana ya zamoyo kumawonjezera mbali ziwiri zazikulu. Choyamba, DNA magazi zidzasankhidwa mosintha m'zipinda mwana wamkazi, choncho pali ma angapo DNA akuchikazi ndi makolo awo. Magazi recombination (kuuzana mbali) ndi njira yachiwiri kuonjezera zosiyanasiyana chibadwa.

Kodi chromatids: Tanthauzo

Pa Chigawo cha ndende Zobwerezedwa likugwirizana ndi mnzake mu dera lotchedwa centromere. Kamodzi chikugwirizana ndi mlongo chromatids ali anapatukana mu anaphase wa mitosis, aliyense wa iwo amatenga dzina latsopano - mwana DNA. ndi chromatid mu zamoyo chiyani? Mwasayansi kulankhula, ali mmodzi wa 2 nucleoprotein filaments popangidwa ndi anawaonjezera kuwirikiza kawiri pa DNA kuti zidzachitika magawano selo. Iwo theka la mabuku awiri ofanana DNA chitidwe.

chromatids Education

Chromatin - ndi DNA kuti chilonda padziko mapuloteni, motero n'kupanga ulusi mwauzimu. Ndi kwa iwo ndipo anapanga chromatid. Pamaso kugawanika khromozomu zikuoneka ngati chromatids lokhala ndi Shackleton. Pambuyo kugawanika amakhala bwino kwa onse X woboola pakati. Mukachipinda munthu lili ndi 23 khromozomu awiriawiri, ndi chiwerengero cha DNA 46.

Pomaliza

Chromatid otchedwa mwina makope awiri a DNA pamodzi amapanga ndi khromozomu zimene poyamba anali chitidwe, ndipo chikugwirizana mu dera kudziwika monga centromere lapansi. Dzinali ntchito bola ngati awa centromeres chomwecho kulankhulana mwachindunji. Pamene DNA agawanika pa anaphase wa meiosis kapena mitosis, ndi chromatids filamentous kukhala ana DNA. Mwachidule, amachepetsa ndi DNA chitidwe.