Chii chinonzi chinangwa chemitosis?
Sero ndicho chinhu chakakosha chinoshanda chinotyaira iyo zviitiko zvehupenyu yezvose kubva kubhakitiriya uye fungi kune bhuruu whale uye shongwe redwoods. Aya masimba akasimba, akaomarara, asi mashoma anowana kukura nekuvandudzwa kwehutachiona hwakawanda kuburikidza nemitosis, chiitiko chinoshamisa chinoshandura sero kuita maseru maviri.
Tsananguro chaiyo
Iyo yakakosha chinangwa of mitosis zvinoenderana nezvinorehwa nezwi iri. Mitosis inowanzo kukurukurwa seyakafanana nesero kupatsanurwa. Mupfungwa iyi, mitosis iri maitiro ayo sero rinozviburitsa roga kuti rigadzire rakafanana mwanasikana sero.
Iyo yakajeka tekinoroji tsananguro yemasosis ndiyo nzira iyo iyo nucleus inozvipindurudza pachezvayo uye ichizvikamura pachayo kuita maviri nuclei ine chaiyo makopi emagene echinhu.
Musimboti mutsva
Mitosis, zvinoenderana nedudziro chaiyo, ine zvikamu zvina zvekutanga: prophase, metaphase, anaphase, uye telophase. Matatu matatu ekutanga anonyanya kutarisana nekuparadzaniswa uye kurongeka kwe kromosomu izvo zvakadzokororwa panguva yeiyo interphase, iyo inotangira mitosis.
Chromosomes marefu mamorekuru ane ruzivo rwemajini muchimiro che deoxyribonucleic acid, inozivikanwa seDNA.
Panguva telophase , nyukosi nyowani inoumba yakatenderedza yega seti yemakromosomes, zvichikonzera maviri magene akafanana. Mitosis inotanga kuitika mukuitika kwesero kupatsanurwa nekuti sero nyowani haigone kurarama isina musimboti une ruzivo rwemageneti rwakakosha manejimendi emabasa emagetsi.
Sero rimwe, masero maviri
Kupatsanurwa kwesero kunotanga nemitosis uye kunopera ne cytokinesis, umo masero emvura, anozivikanwa se cytoplasm, anotsemuka kuita maseru maviri akatenderedza nuclei mbiri dzakaumbwa panguva yemitosis.
Mumaseru emhuka, cytokinesis inoitika senzira yekudzikisira iyo inozopedzisira yasvinira sero remubereki mumwe muzvikamu zviviri. Mune-maseru maseru, cytokinesis inozadzikiswa neplate yemaseru iyo inogadzira nepakati pechitokisi uye pakupedzisira inopatsanurwa kuita maviri maseru.
Kwete Nucleus, hapana mitosis
Tsananguro chaiyo yemasosis sekuparadzaniswa kwenyukireya pane kuwanda kwemaseru kunobatsira kujekesa pfungwa yakakosha - mitosis inoshanda chete kumasero eukaryotic. Maseru ese anowira mumapoka maviri akafara: prokaryotic uye eukaryotic. Hutachiona uye zvimwe zvakasarudzika-zvakagadzirwa zvisikwa zvinozivikanwa seArchaea ndiwo ma prokaryotic masero, uye zvipuka zvakaita semiti, mhuka, uye fungi zvine eukaryotic masero.
Imwe yemhedzisiro yekumira pakati pemhando mbiri idzi dzemasero pamberi pechinhu chakakosha: eukaryotic maseru ane akasiyana musimboti, uye prokaryotic masero haana. Nekudaro, mitosis haigone kushanda kune prokaryotic cell kupatsanurwa, iko kunonzi kunzi kuchenesa kwemabhinari.
Zviri Mukati