The mekhahlelo e sa mitosis: litšobotsi tse bona. Meaning of karohano mitotic seleng ea

Sele potoloho - nako e ho tswa ho e mong karohano seleng ea ho e hlahlamang. Ho nka sebaka ka mekhahlelo e 'meli e latellanang - interphase le karohano e loketseng. The nako ya tshebetso ena e fapana ho itšetlehile ka mofuta oa liseleng.

Interphase ke nako e pakeng tsa likarohano seleng e 'meli, ka nako ho tloha karohano ho qetela ho isa lefung seleng e kapa ho lahleheloa ke matla a ho arola.

Ka nako ena, ka seleng e ntse e hōla 'me habeli DNA ea eona, hammoho le mitochondria le plastids. Ka interphase fetisa protheine tswakana , le metsoako e meng manyolo. Tsela fetisisa e tlhokomelwa fela thata go tswakana ho bontšoa go tswakana interphase. Ka nako ena, habeli chromatids nyutlelie, e bolokwa matla ao tla sebelisoa nakong ea karohano. Hape, palo e ntseng e eketseha ea organelles sele le centrioles.

Interphase ae phethang hoo e ka bang 90% ea potoloho ea seleng. Mora o feta mitosis, e leng tsela e ka sehloohong ea karohano ea lisele eukaryotic (phelang eo lisele tse nang le e le khubung thehoa).

Ka mitosis, ho chromosomes le le khutsufalitsoeng le theha sethusathuto khethehileng, e leng boikarabelo ba ho kabo junifomo ea boitsebiso bo liphatseng tsa lefutso pakeng tsa lisele tse thehoa ka ho tshebetso ena.

Cell karohano etsahala ka mekhahlelo e 'maloa. sethaleng mitotic tšoauoa ka litšobotsi tse ka bomong le nako e itseng.

The mekhahlelo e sa mitosis

Ha lisele tsa feta mitosis ngollana mekhahlelo e sa mitosis: prophase, metaphase mora e tsoela, anaphase, telophase ke ea ho qetela.

mitotic mohato tšoauoa ka lintho tse latelang:

• prophase - nyamela le enfelopo ea nyutlelie. Ka mohato ona, centrioles diverge ho lipalo ea sele le chromosomes le le khutsufalitsoeng (katiloe);
• metaphase - Sebelisa tšoauoa chromosomes maximally katiloe tse entsoe ka chromatids tse peli ka tlaase ho equator (ea bohareng) e seleng. ketsahalo ena e bitsoa ho poleiti metaphase. Ho ka etsahala hore re hlahlobe chromosomes tlasa microscope hantle bontša. Ka metaphase tsa mitosis etsahalang hape hokela pheletsong e 'ngoe ea dikgwele leakage radiation ho centromeres tsa chromosomes pheletsong e' ngoe - ho centrioles ena.
• anaphase - bontšoa ke karohano ea chromosomes ka chromatids le (ba qhalakanyetsa ho lipalo fapaneng). Ka tsela eo chromatids ba chromosomes arohaneng, tseo bopilwe le 'ngoe feela chromatid thread;
• telophase - tšoauoa decondensation chromosomes le sebopeho ho pota mong le e chromosome tsa enfelopo e ncha tsa nyutlelie. li phutholohe leakage radiation nyamela ka khubung ea hlaha nucleoli. Ka telophase le cytokinesis makhalo, e leng petsoha ha cytoplasm pakeng tsa lisele tsa morali. Mokhoa ona o etsoang ho tsoa e le liphoofolo tse se loketseng ho khethehileng bokaholimo ba matsoele mohoma (thekeng, e arola ka seleng ka tse peli). Ka lisele tse dimela cytokinesis thulaganyou e seleng ea poleiti fana le ho Golgi rarahaneng.

ke se boleloang ke likokoana-hloko tsa thulaganyou e mitosis eng?

The mekhahlelo e sa mitosis bebofatsa phetiso e nepahetseng ea lesedi liphatsa tsa lefutso liseleng morali, ho sa tsotellehe palo ea likarohano. Ka tsela eo e mong le e ba bona ba fumana chromatid mong e re thusang hore re lule re le tumellano nomoro ya chromosomes liseleng tsohle tse thehoa ka ho arola. E fana ka phetiso ea mitosis ea moshoelella sete ea lintho tse bonahalang le liphatsa tsa lefutso.