Mitosis

Isho ukuthini i-mitosis?

Amaseli ayahlukana ukuze akhe amaseli amasha. I-Mitosis yinqubo edingekayo ukuze kwakhiwe iseli elisha. Iseli eselizohlukana libizwa ngokuthi i-mitotic figure. Izazi zezifo ziyakwazi ukubona izibalo ze-mitotic lapho zibheka isampula yethishu ngaphansi kwesibonakhulu. Izibalo ze-Mitotic zibonakala kalula ngoba izinto zofuzo ngaphakathi nucleus ishintsha umbala nokuma ngaphambi kokuba iseli lihlukane.

Izigaba ze-mitosis

Inqubo ye-mitosis ihlukaniswe ngezigaba (bheka isithombe esingezansi). Lezi zigaba zibizwa ngokuthi i-prophase, i-metaphase, i-anaphase, ne-telophase. Ngesikhathi se-prophase, inani lezakhi zofuzo kuseli liphindwe kabili ukuze kube nokwanele amaseli amasha amabili. Ngesikhathi se-metaphase izakhi zofuzo ziba phakathi nendawo yeseli. Ngesikhathi se-anaphase, amangqamuzana aqala ukuhlukana abe amaseli amabili futhi izakhi zofuzo zihlukaniswa ngesigamu ukuya kungqamuzana ngalinye elisha. Ekugcineni, ku-telophase, kwakheka amaseli amasha amabili anezakhi zawo zofuzo ngaphakathi nucleus.

Ngokuvamile atholakala kuphi amaseli ahlukanisayo?

Amaseli ahlukanisayo atholakala kuzo zombili izicubu ezijwayelekile kanye nezicubu ezingajwayelekile ezifana nomdlavuza. Ngenxa yokuthi umdlavuza ukhula ngokushesha kakhulu kunezicubu ezivamile, ngokuvamile unamaseli amaningi ahlukanisayo. Ama-Mitose nawo akhona kwabaningi isasebenza izimo (ezingezona umdlavuza). Isimila esinama-mitose amaningi sikhula ngokushesha, kodwa lokhu kungase futhi kusho ukuthi sisengozini yokuthola ukwelashwa okufana nokwelashwa ngamakhemikhali okuqondise kumaseli ahlukanayo.