Wareegga nolosha unugyada - muddada u dhaxaysa ay dhalashada horyaalka madax banaan ama dhimasho

Wareegga nolosha unugyada - mudada of unit hoose nool ka aasaasay si ay horyaalka heerka gaarka ah ee qeybinta ama dhimasho. Waxaa ka mid ah oo dhan isbedel dabiiciga ah in tijaabada organelles fulinta xilkooda.

Iyadoo ku xiran ay wareegga gacanta ururka iyo heerka takhasuska socon kartaa 30 daqiiqo iyo 3 maalmood. Tusaale ahaan, marka burburiyo unugyada ee echinoderms wareegga nolosha waa 30 daqiiqo, iyo epidermis xiidmaha in aadanuhu - 12 saacadood. Waxaa sidoo kale jira kuwa unugyada aasaasiga ah ee ku nool, taas oo aan la kala qaybiyey, ie, ma soo saari, ay u fuliyaan shaqadooda loogu tala galay oo ku dhintay - .. Sida dareemayaasha, fiiloyin muruqa striated. Is wareegga nolosha gacanta loo qaybin karaa laba periods: interphase, ama muddada koritaanka iyo maytosis - qeybinta muddo. Interphase waxaa ka mid ah, siday u kala horreeyaan, tiro ka mid ah weji:

1. G1 (postmitotic) - wajiga koritaanka hore. Marka marxaladdan, shirkii reer binu mRNA ah, borotiinada iyo qaybaha unugyada kale.
2. S (dardaro) - dhacdaa taranka DNA, taas oo horseedaysa in ay labanlaabmayso ee wax hidaha. Dhammaadka marxaladda laba ka mid ah foomka DNA galool isla double. Mid kasta oo ka mid ah qaybood ee deoxyribonucleic acid ka kooban yahay mid loogu aarayo jir ah, oo kii labaadna wuxuu ahaa - mid cusub, taas oo la aasaasay oo ku saleysan complementarity.
3. G2 (premitotic) - waa hab dayactirka, oo ay ku jiraan la saxo qaladaad ka dhigay inta lagu guda jiro ereygu DNA in wajiga hore. Hamineysay nafaqada, tamarta, sii wadaan in ay synthesize borotiinada iyo RNA.

element ugu muhiimsan waa dhalmo wareegga mitotic of proliferative cell ama kaas oo si toos ah uu bilaabo ka dib markii G2. Waa set oo ah hawlgaladii dhaca qaybta hoose ee dhismaha ka mid ah oo ku nool mid ka mid qeybinta ilaa darafka kale oo ay u sameeyaan jiil cusub oo unugyada hoosaad. Maytosis waa nooca ugu weyn ee horyaalka heerka degaaankaaga (aan ka qayb dhalmo galmada) cutubyo hoose ee noolaha nuclear.

wareegga nolosha unugyada lagama maarmaanka u ah jidhka, bixinta badbaadada ee tirada iyo qaabka koromosoomyada caan kasta noocyada (karyotype), sidaa darteed waxaa muhiim ah in dhammaan xilliyada kala qeybinta ayaa maray oo aan khalkhal kasta. Maytosis ka kooban yahay 4 marxaladood oo isku xigta:

1. Prophase. Muddadan, qeybinta unug dhacdaa iyo farqi u dhexeeya centrioles ulo, kuwaas oo isku xidhan by qeybinta dunmiiqa ah. By dhamaadka nucleoli mudadaas sii muuq koromosoom awgii iyo gaabisay, i.e. waa ay uumiga.
2. Metaphase. Qaab dhismeedka Nucleoprotein waafaqsan weheliyaan unugyada dhulbaraha sameeyay saxan metaphase ah. Yimaado Cidhiidh aasaasiga ah ee koromosoomyada ah. Markaas, mid kasta oo iyaga ka mid ah waxa loo kala qaybiyaa laba chromatids.
3. Anaphase. Marxaladan obrazovashiesya koromosoomyada gabadhiisa u guurto ulaha kala duwan, halkaas oo ay si siman baxay iyo unwind.
4. Telophase. Soo celiyo nucleolus iyo heerka asaasiga ah ee cytoplasm dhacdaa.

Sayidka, wareegga unug - wakhtiga ugu nolosha laga bilaabo dhalashada ilaa unit hoose dhimashada kuwa nool.