Ukubaluleka begazi mitosis

Ukubaluleka begazi mitosis kuphezulu kakhulu. Neposveschennomu ngisho kanzima ukulubona ngeso lengqondo indima ayifeza ukuphila yenchubo weseli ukuhlukana emzimbeni. Ikhono lamaseli ukwabelana - lona umyalo obaluleke kakhulu umsebenzi wabo, eyisisekelo. Ngaphandle lokhu ukuqhubeka kungenzeki lwezinto eziphilayo emhlabeni, okwandisa labantu eziphilayo owumphumela akakwazi ukuthuthukisa, futhi ukuba khona umzimba esikhulu ezinamangqamuzana amaningi, akunakwenzeka ukuzala ngokuthuthukisa impilo entsha futhi iqanda elivundisiwe.

Ukubaluleka begazi mitosis kungaba ingasaphathwa uma division iseli kwakungelona okushiwo iningi ezenzekayo eplanethini yethu izinqubo yezinto eziphilayo. Le nqubo ithatha indawo ngezigaba eziningana. Ngamunye wabo kuhlanganisa izenzo ezithile ngaphakathi engqamuzaneni. Waba yini umphumela walesi kuyinto ukubuyabuyelela esiyisibopho ngesisekelo kwezakhi kuseli eyodwa ngengxenye ngo Ukubuyelela kabili DNA kamuva wabeletha iseli umzali indodakazi ezimbili.

Yonke impilo yeseli lingahunyushwa baphetha esikhathini kusuka kumiswa ongaphansi division kwalo okwalandela ku ezimbili. Lesikhatsi lesi eziphilayo eyaziwa ngokuthi "cell umjikelezo".

Isigaba sokuqala kakhulu mitosis - isilungiselela efanele cell division. Isikhathi lapho amaseli afakwa izikhwebu enze ukulungiselela oqondile yokwahlukana, ngokuthi interphase. Kwenzeka konke ebaluleke kakhulu - okungukuthi, kabili imicu DNA nezinye izakhiwo, kanye zamagama esiningi amaprotheni. Ngakho, chromosome iseli kuthiwa kabili, nengxenye chromosome double ngasinye kuthiwa "chromatid".

Ngemva interphase iqala ngqo inqubo division - mitosis. Yena, futhi, ethatha indawo ngezigaba eziningana. Ngenxa yalokho, yonke kabili welulela afanako e yezinyoni, ukuze emva kumiswa ukwahlukanisa eliyingqikithi ingqamuzana ngalinye elisha kwakhiwa inombolo efanayo izingxenye ezisele.

Izigaba mitosis futhi meiosis zifana, kodwa in the sakamuva (sokuhlukanisa germ cells) has ezimbili, futhi ekugcineni kuvela hhayi ezimbili, kodwa kletki ezine "indodakazi." Futhi, ngaphambi yesibili division okungaxhunyiwe ku-intanethi chromosome kabili, ngakho iqoqo yabo isigamu uhlala kumaseli indodakazi.

1. Prophase. Esigabeni lesi, amaseli centrioles abonakala kakhulu. Zikhona kuphela kuseli bezilwane nabantu. Izitshalo akudingeki centrioles.
2. prometaphase. Kuleli qophelo kube uphela prophase futhi metaphase iqala.
3. Metaphase. Kuleli qophelo, chromosome abalale "yenkabazwe" esitokisini.
4. Anaphase. Ngokuvamile ama-chromosome asuke ku izingongolo ezahlukene.
5. Telophase. Omunye ingqamuzana "umama" lihlukaniswe by kumiswa ukwahlukanisa emaphakathi ku kletki ezimbili "indodakazi." uqeda Kanjalo division iseli noma mitosis.

Ukubaluleka ezibaluleke kakhulu begazi mitosis - Yilokho kanye ophikweni olunamandla efanayo-chromosome abaphindiwe izingxenye 2 alinganayo futhi ukubenza e kletki ezimbili "indodakazi." izinhlobo ezihlukene zamangqamuzana amaseli eziphilayo ezihlukahlukene singeqi esukela ngesikhathi division - mitosis, kodwa isilinganiso kuthatha omunye nengxenye amahora. Kunezici eziningi ukuthi nomthelela kule nqubo zintekenteke kakhulu. Noma yimiphi imibandela kwemvelo nokushintsha, isib, kuma lokushisa, ukukhanya isigaba mode, umfutho imvelo futhi i umzimba bese amaseli kanye nezinye izinto eziningi okungenzeka kakhulu ezithinta kokubili isikhathi kanye nekhwalithi inqubo cell division. Futhi, ubude besikhathi mitosis futhi zonke izigaba zayo ngazinye kungaba encike ngqo kwi uhlobo izicubu, kumaseli okuyinto uyaqhubeka.

Ukubaluleka begazi mitosis lapho kutholakala into entsha ngasinye emkhakheni Cytology uba usizo kakhulu, ngoba ngaphandle kule nqubo akukwazi ukuphila emhlabeni.