Meiosis kunye mitosis: umahluko ophambili

Zonke izinto eziphilayo iqanjwa iiseli ukuba baphile ubomi babo, isabelo nokukhula. Inkqubo lidala kungenziwa ngeendlela malungana ngokupheleleyo ezimbini babe izigaba ezifanayo: meiosis kunye mitosis.

Kuba eziphilayo zabo iiseli i mitosis ngumongo isici ophilileyo. Oku ikakhulu izilwanyana, izityalo kunye nezinye izinto. Zesayensi, indlela candelo kuthiwa andise kwezityalo. Meiosis kwakhona indlela yoqhekeko, kodwa uphawu wayo - nokwahlula inani zofuzo.

Masiqonde umahluko phakathi mitosis evela meiosis. inkqubo nganye linyathelo efanayo, kodwa elowo kubo iimpawu kweempawu umahluko omkhulu.

Isigaba sokuqala - inkqubo ngokucandeka. Le nkqubo iquka lidala zofuzo mitotic. Nganye kwezi fom ezimbini ezintsha, ezo isasazwe phakathi iiseli ababini bavele. Inzululwazi kubonakele ukuba bayahlelwa iseli omtsha ukuze kubekho isiphumo eyahlukileyo ngokupheleleyo. Ngoko ke, umzekelo, baqhubeke ukwabelana okanye ukwahlulwa iya kuqhubeka iseli enye. ukupheliswa kunokwenzeka yenkqubo ngokucandeka kwi ngaxeshanye ezimbini iiseli.

inkqubo meiotic wahlukile kancinci. Oku kusekelwe ngamaqela amabini wabeka. Eyokuqala sikhatshwa ukuhla kwinani zofuzo kanye kabini. iseli Diploid iqhekeka zibe haploid ezimbini. Kuba chromosome ngalinye luphawulwa ubukho chromatids ezimbini. Icandelo lesibini ayithethi ukuba kukho ukuhla kwamanani zofuzo. Ngenxa yoko, kwicandelo lesibini akhiwa iiseli ezine ezintsha. Iseli nganye yenzelwe chromosome elinye kunye chromatid. Meiosis kunye mitosis, nangona ezifana zabo, umahluko sele kwinqanaba lokuqala.

Isigaba sesibini - conjugation. Lokuqala Icandelo iseli ngexesha meiosis ibandakanya umbutho zofuzo homologous. inkqubo mitosis yohlukile ukungabikho ogcweleyo uhlobo ukukhwela. Oku kulandelwa ulungelelwaniso zofuzo. Mitosis luphawulwa bubukho zofuzo bafundelane ngezibini, kodwa usasazo efanayo kunye neikhweyitha ayikho ngababini, kodwa zodwa. Ngaloo ndlela inkqubo meiosis kuthatha isiphumo eyahlukileyo ngokupheleleyo. Apha ulungelelwaniso ecaleni ikhweyitha udlula ngababini.

Uthelekiso iinkqubo mitosis kunye meiosis wabonisa ukuba umahluko angabonakaliyo kuphela kwicandelo, kodwa ekugqibeleni. Mitosis uba isisekelo ukuze kwakhiwe ezitshatileyo kunye neeseli somatic diploid. Kufuneka kuqatshelwe ukuba kuyo yonke inkqubo wasindisa izinto zofuzo. Ngenxa yoko, isenzeko meiosis, ngababini ezimbini wabumba obuni iiseli haploid umlinganiswa. Njengoko kumbuzo ilifa, oko awugcinwanga yaye ekugqibeleni umva.

Nangona kunjalo, umahluko ophambili ilele uhlobo inkqubo yokuzala. Meiosis - inkqubo ukuzala, leyo ngokuqhelekileyo kwenzeka kuphela kwi iiseli intsholongwane kwi ekukhuleni bakala. Mitosis kuba sisiseko maqanda iiseli somatic. Ukongeza, kuba kuphela kwendlela eya mitosis yokuba iiseli somatic ukuze achache.

Ukongeza, meiosis kunye mitosis umahluko ebalulekileyo uhlobo yemishini yayo. Meiosis ihamba kunye nokugcina inani rhoqo zofuzo kudaleke ukuvela kwabantu abatsha. Ziye ke yakhiwa zinto njengelifa. Mitosis isekelwe phezu kabini zofuzo. Kuthatha indawo ngokwesiseko zokwahlula longitudinal. Enye kwakheka kwi chromosome diverge iiseli intombi. Ulwazi lokuqala ezidluliselwa sitsho yaye akatshintshi. Yeyona inkqubo mitosis, wabeka isiseko kuphuhliso eziphilayo ezinama iiseli ezininzi. Oku kunokwenziwa isigqibo sokuba meiosis kunye mitosis, nangona elandelwa injongo enye, abe isixa esikhulu lweeyantlukwano ezichaseneyo.