Ko te wāhanga o te whāū pūira: ratou āhuatanga. Meaning o wehewehenga pūtau mitotic

Ko te huringa pūtau - te wa i tetahi wehenga pūtau ki te muri. E te reira i wahi i roto i te rua ngā wāhanga whai - interphase me te wehenga tika. Ko te roanga o tenei tukanga rerekē i runga i te momo o ngā pūtau rānei.

Interphase Ko te wā i waenganui i wehenga pūtau e rua, te wa i te wehenga whakamutunga ki te mate pūtau mate o kaha ki te wehe ranei.

I roto i tenei wā, tupu te pūtau me huaruatia tona DNA, me te pungaraungao me plastids. I roto i te interphase haere kōtuitanga pūmua , me ētahi atu ngā pūhui matū waro. whakaaturia te tukanga tino inarā kete e i roto i Synthesis interphase. I tenei wa, rua chromatids karihi, kei te rongoa pūngao kia e ka whakamahia i roto i te wehenga. Ano, he maha piki haere o organelles pūtau me centrioles.

Interphase noho tata 90% o te huringa pūtau. I muri haere reira whāū, e ko te ara matua o te wehenga o ngā pūtau eukaryotic (rauropi i roto i te karihi i hanga nei ngā pūtau).

I whāū pūira, te pūira whātatahia ka hanga e te taputapu motuhake, i te kawenga mō te tohatoha ōrite o te mōhiohio ā-ira i waenganui i ngā pūtau e kua hanga e e tenei tukanga.

wehenga pūtau e wahi i roto i te maha o ngā wāhanga. atamira mitotic āhuatanga e ngā āhuatanga takitahi me te tetahi roanga.

Ko te wāhanga o te whāū pūira

A, no te mamae pūtau whāū hāngai ngā wāhanga o te whāū pūira: prophase, metaphase i muri haere reira, anaphase, he whakamutunga telophase.

wāhanga mitotic āhuatanga e te āhuatanga e whai ake nei:

• prophase - ngaro te kōpaki karihi. I roto i tenei wā, te mahuetanga nga centrioles ki amo o te pūtau me ngā pūira whātatahia (raungaitia);
• metaphase - Whakamahia āhuatanga pūira maximally pēpēhia e kua tito o rua chromatids i te weheruatanga pūtau (waenganui). huaina ana tēnei āhuatanga ko te paraharaha metaphase. Ko taea ki te titiro e pai whakaaturia pūira i raro i te karu. I roto i te metaphase o whāū e tupu tāpiri hoki tetahi pito o miro muka ki centromeres o pūira atu pito - ki te centrioles.
• anaphase - whakaaturia ko te wehenga o te pūira i roto i te chromatids (titaria ratou ki amo rerekē). Ko te kupu chromatids hei pūira motuhake, e ngā o tetahi anake miro chromatid;
• telophase - pūira decondensation āhuatanga me te hanganga a tawhio noa ia pūira o te kōpaki karihi hou. kakawaea muka ngaro i roto i te karihi puta nucleoli. I roto i te telophase me cytokinesis whitinga, i te mea he wehenga o te cytoplasm i waenganui i nga pūtau tamahine. kawea ana tēnei tukanga i roto i roto i nga kararehe e tika ki te awa parautanga wāhinga motuhake (hope, e tuwhaina e te pūtau i roto i te rua). I roto i te tipu pūtau whakaratohia tukanga cytokinesis pereti pūtau ki te matatini Golgi.

He aha te mea te auraa koiora o te tukanga whāū?

Ko te wāhanga o te whāū pūira whakahaere tuku tika o te mōhiohio ā-ira ki ngā pūtau tamahine, ahakoa o te maha o wehenga. Ko te kupu ia o ratou manako tetahi ki tetahi chromatid e tauturu mau tonu te tau ōrite o pūira i roto i ngā pūtau katoa e kua hanga e na roto i te wehewehe. E whakarato ana te tuku o te whāū pūira huinga ukauka o rauemi ira.