Kodi cholinga cha mitosis ndi chiyani?
Selo ndilo gawo logwirira ntchito lomwe limayendetsa zochitika zachilengedwe za chilichonse kuyambira mabakiteriya ndi bowa mpaka anamgumi amtambo ndi ma redwood. Zinthu zazikuluzikulu, zovuta, koma zazing'ono zimathandizira kukula ndi kusinthika kwazinthu zamoyo zingapo kudzera mu mitosis, chinthu chodabwitsa chomwe chimasintha khungu kukhala maselo awiri.
Kutanthauzira kolondola
Chofunikira cholinga ya mitosis zimatengera tanthauzo lomwe mumagwiritsa ntchito nthawi ino. Mitosis nthawi zambiri imakambidwa ngati tanthauzo logawa kwama cell. Mwanjira iyi, mitosis ndi njira yomwe khungu limadzibala lokha kuti apange selo lofanana la mwana wamkazi.
Kutanthauzira kolondola kwambiri kwa mitosis ndiyo njira yomwe nyukiliya imadzilembera yokha ndikudzigawa m'magawo awiri okhala ndi mitundu yeniyeni yazomwe zimapangidwira.
Chiyambi chatsopano
Mitosis, malinga ndi tanthauzo lenileni, ili ndi magawo anayi oyambira: prophase, metaphase, anaphase, ndi telophase. Magawo atatu oyamba makamaka akukhudzidwa ndi kupatukana ndi kayendedwe ka ma chromosome zomwe zidabwerezedwa mkati mwa interphase, yomwe imayamba kutengera mitosis.
Ma Chromosomes ndi mamolekyulu ataliatali omwe amakhala ndi zidziwitso zamtundu wa deoxyribonucleic acid, yotchedwa DNA.
Pa telophase , nyukiliya yatsopano imazungulira gawo lililonse la ma chromosomes, zomwe zimabweretsa ma nuclei awiri ofanana. Mitosis yoyamba imachitika pakugawana kwama cell chifukwa khungu latsopanoli silingakhale ndi moyo popanda gawo lomwe lili ndi chidziwitso chabwinobwino chofunikira pakuwongolera magwiridwe antchito am'manja.
Selo limodzi, maselo awiri
Kugawikana kwama cell kumayamba ndi mitosis ndipo kumathera ndi cytokinesis, momwe madzi amadzimadzi, otchedwa cytoplasm, amagawanika ndikupanga maselo awiri ozungulira ma nuclei awiri omwe amapangidwa pa mitosis.
M'maselo azinyama, cytokinesis imachitika ngati njira yochepetsera yomwe pamapeto pake imafinya khungu la kholo limodzi m'magulu awiri. Maselo obzala, cytokinesis amakwaniritsidwa ndi mbale yama cell yomwe imakhazikika pakatikati pa seloyo ndipo imagawika m'maselo awiri.
Palibe Nucleus, palibe mitosis
Kutanthauzira kolondola kwa mitosis ngati gawo la zida za nyukiliya m'malo mwamagawo ambiri amathandizira kufotokoza mfundo yofunikira - mitosis imangogwira ntchito pama cell a eukaryotic. Maselo onse amagawika m'magulu awiri akulu: prokaryotic ndi eukaryotic. Mabakiteriya ndi zolengedwa zamtundu umodzi zodziwika bwino zotchedwa archaea ndi ma prokaryotic cell, ndipo zamoyo monga zomera, nyama, ndi bowa zimakhala ndimaselo a eukaryotic.
Chimodzi mwazomwe zimasiyanitsa mitundu iwiri yamaseloyi pomwe pali pachimake: Maselo a eukaryotic amakhala ndi gawo lina, ndipo ma prokaryotic alibe. Zotsatira zake, mitosis silingagwire ntchito yamagulu a prokaryotic cell, omwe amatchedwa kuti cleavage.
Zamkatimu