Mene ne mitosis da kuma abin da aiwatar faruwa a prophase na mitosis?

Mene ne mitosis da meiosis kuma wanda lokaci da suka yi? Wannan cell division, wanda yana da wasu bambance-bambance. Lokacin da meiosis hudu na biyu kafa daga iyaye tsakiya a cikin abin da rage yawan chromosomes (sau biyu). A mitosis, kuma ya auku cell division, amma irin wannan ake kafa biyu kawai ya Kwayoyin tare da wannan chromosomes matsayin iyaye.

Saboda haka abin da yake cikin mitosis da meiosis? Wannan rabo na nazarin halittu hanyoyin, a lokacin da Kwayoyin suna kafa tare da wasu chromosomes. Sake bugun ta mitosis faruwa a kwayar kwayoyin, hadaddun rayayyun kwayoyin.

mataki

Mitosis faruwa a matakai biyu:

1. Anya da bayanai a kayyade matakin. Ga uwa Kwayoyin barsu tsakanin wani kayyade bayani. A wannan mataki, da chromosomes aka canza.
2. Mitotic mataki. Ya kunshi lokaci lokaci.

Cell samuwar auku a dama, saukarwa.

lokaci

Mitosis ne zuwa kashi da dama bulan:

• telophase.
• anaphase.
• metaphase.
• prophase.

Wadannan bulan faruwa a wasu jerin kuma suna da nasu halaye.

A wani hadadden Multi-salon salula mitosis sau da yawa ya shafi cell rabo daga cikin undifferentiated irin. A mitosis iyaye cell raba wa yaro, yawanci biyu daga gare su. Daya daga cikin su ya zama wani tushe da kuma ci gaba da rabo, da kuma na biyu tasha rarraban.

Interphase

Interphase - a cell shiri domin rabuwa. Yawanci, wannan mataki fitowa zuwa ashirin hours. A wannan lokaci, yana tafiya da yawa daban-daban tafiyar matakai, a lokacin da Kwayoyin suna shirya wa mitosis.

A wannan lokacin akwai wani rabo daga sunadarai, wasu gabbansa adadin ƙaruwa a DNA tsarin. By karshen na ƙungiyar kayyade kwayoyin suna ninki biyu, da kuma yawan chromosomes aka bai canja ba. M DNA suna spliced da biyu chromatids a daya kwayoyin. Kafa chromatids ne m, kuma suna da 'yar'uwa.

Bayan kammala Interphase na mitosis fara zahiri. Ya kunshi prophase, metaphase, anaphase da telophase.

prophase

A rukunin farko na mitosis - prophase shi. Yana yana game da sa'a guda. An conventionally kasu kashi dama, saukarwa. A can farko a prophase na mitosis nucleolus ne ta ƙara, a sakamakon wanda kwayoyin suna kafa. By ƙarshen zamani, kowane chromosome aka hada biyu chromatids riga. Nucleoli da makaman nukiliya membrane ake narkar da, duk abubuwa ne a cikin wani keji a cikin wani rikici. Bugu da ari, a cikin prophase na mitosis aka kafa achromatin division rabo yarns wuce ta hanyar dukan cell, da kuma wasu suna da alaka da tsakiyar abubuwa. A wannan tsari, da abun ciki na kwayoyin code zauna canzawa.

Yawan chromosomes a prophase na mitosis ba ya canja. Abin da ya faru kara? A prophase na mitosis auku Lalacewar nukiliya ambulaf, wanda a cikin sa karkace chromosomes bayyana a cikin cytoplasm. Barbashi nukiliya ambulan rududdugaggu samar da kananan membrane vesicles.

A prophase na mitosis, da wadannan na faruwa: dabba cell zama zagaye, amma shi ba ya canja siffar da shuke-shuke.

metaphase

Bayan prophase metaphase fara. A wannan lokaci, chromosomes Helix kai ta ganiya. Taqaitaccen chromosomes fara motsawa zuwa tsakiyar cell. A lokacin da tafi, suna sanya daidai a garesu. Akwai kafa metaphase farantin. A lokacin da la'akari da Kwayoyin ne a fili bayyane chromosome. Yana da yake a metaphase suna da sauki yin lissafi.

Bayan samuwar metaphase chromosomes kafa na ƙididdiga, musamman ga tantanin halitta irin. Wannan na faruwa da tarewa da chromosomes amfani alkaloids.

Kowane kwayoyin na da sa na chromosomes. Alal misali, su 20 masara da strawberries a gonar - 56. A cikin jikin mutum chromosomes kasa da berries, duk 46.

anaphase

All matakai a cikin prophase na mitosis ƙare da kuma fara anaphase. A wannan tsari, duk da sadarwa suna karya chromosome da kuma fara matsawa a tarnaƙi na juna. A related anaphase chromosomes zama m. Suna samun cikin da dama Kwayoyin.

Phase diverging iyakar zuwa sandunan chromatids Kwayoyin. Har ila yau, a nan ne rarraba kwayoyin bayanai tsakanin rassa da iyaye cell.

telophase

Chromosomes suna located a zura sandunan ɗaukarsa. A karkashin madubi, suka zama da wuya a ga saboda core harsashi da aka kafa a kusa da su. Dogara sanda ne gaba daya hallaka.

A shuke-shuke, a membrane aka kafa a cibiyar na cell, da kuma shimfidawa a hankali don a zura sandunan. Ita ce mahaifiyar cell raba zuwa sassa biyu. Da zarar membrane ne cikakken girma, akwai wani cellulose bango.

Features mitosis

Cell division iya The birki saboda high yanayin zafi, daukan hotuna zuwa gubobi, radiation. A lokacin nazarin mitotic Kwayoyin a daban-daban kwayar kwayoyin za a iya amfani da poisons cewa hana mitosis a metaphase mataki. Wannan damar da wani cikakken binciken chromosomes, kawo kariotopirovanie.

Mitosis a Table

Mun la'akari da kasoshin lokatan cell division a tebur a kasa.

Kan aiwatar da mitosis matakai ma za a iya gani a cikin tebur.

Mitosis a dabbobi da kuma shuke-shuke

Features na wannan tsari za a iya bayyana a wani kamanta tebur.

Saboda haka, za mu yi la'akari da aiwatar da cell division a dabba kwayoyin da kuma shuke-shuke, kazalika da halaye da kuma bambance-bambance.