Meiosis ndi mitosis: kusiyana chachikulu

zamoyo zonse ndi lopangidwa ndi maselo pamoyo wawo, kugawana kukula. The ndondomeko kugawaniza angayambe njira ziwiri zosiyana kwathunthu kuti ndi mbali yomweyo: meiosis ndi mitosis.

Zamoyo amene maselo muli phata khalidwe mitosis wamoyo. Ndi ambiri nyama, zomera ndi bowa. Mu sayansi, njira ya kugawikana amatchedwa vegetative kafalitsidwe. Meiosis ndi njira ya kugawikana, koma mbali yake - halving topangira DNA.

Tiyeni timvetse kusiyana pakati mitosis ku meiosis. Aliyense ndondomeko chinthu ofanana, koma aliyense wa iwo mbali khalidwe, ndiwo kusiyana chachikulu.

Gawo loyamba - ndondomeko fission. Dongosololi kumaphatikizapo kugawa DNA mitotic. Aliyense wa awa mitundu iwiri watsopano, amene amafalitsidwa pakati pa maselo ziwiri zikhadabvala. Science watsimikizira kuti tsogolo la Selo latsopano mwina sizim'chitikira kwathunthu. Mwachitsanzo, iwo akhoza kupitiriza kugawa kapena kugawaniza adzapitiriza khungu limodzi. Zotheka kuchotsa ndondomeko fission mu maselo awiri nthawi imodzi.

meiotic ndondomeko ndi zosiyana pang'ono. Bukuli lili ndi magulu anaika. Woyamba limodzi ndi kuchepa kwa chiwerengero DNA ndendende kawiri. Diploid selo linagawanika mu awiri haploid. Pakuti aliyense khromozomu amakhala ndi kukhalapo kwa chromatids awiri. Gulu lachiwiri sizikutanthauza kuchepa kwa chiwerengero DNA. Motero, gulu lachiwiri anapanga maselo anayi atsopano. Mukachipinda isanafalikire khromozomu wina ndi chromatid. Meiosis ndi mitosis, ngakhale kufanana awo, kusiyana ndi kale pa gawo loyamba.

Gawo lachiwiri - conjugation. Woyamba magawano selo pa meiosis kumatanthauza kucheza DNA magazi. mitosis ndondomeko losiyana okwana kusapezeka kwa mtundu uliwonse mating. Pamakhala mayikidwe DNA. Mitosis amakhala ndi kukhalapo DNA wophatikizidwa, koma yogawa awo yunifolomu pamodzi equator si awiriawiri, payokha. Choncho meiosis ndondomeko adzatenge zotsatira chosiyana. Apa mayikidwe pamodzi equator akudutsa awiriawiri.

Kuyerekezera njira ya mitosis ndi meiosis anasonyeza kuti kusiyana kuoneka osati magawano, koma m'kupita. Mitosis amakhala maziko mapangidwe mabanja ndi somatic maselo diploid. Tikumbukenso kuti mu ndondomeko opulumutsidwa chibadwa. Chifukwa, zosayembekezereka wa meiosis, ndi mitundu iwiri iwiri anapanga maliseche haploid maselo khalidwe. Monga ku funso la cholowa, si kusungidwa ndipo m'kupita anyamata.

Komabe, kusiyana waukulu lagona pa chikhalidwe cha ndondomeko kubalana. Meiosis - ndondomeko ya kubereka, amene amatenga malo yekha maselo nyongolosi mu siteji kusasitsa. Mitosis ndi maziko a asexual maselo somatic. Komanso ndi njira yokhayo mitosis kwa maselo somatic kuti achire.

Komanso, meiosis ndi mitosis kusiyana kwambiri pa chikhalidwe cha cholinga chake. Meiosis limodzi ndi ntchito yokonza nambala zonse DNA ndipo kumapangitsa zikamera atsopano. Iwo wapangidwa ndi chibadwa. Mitosis zachokera anawaonjezera kuwirikiza kawiri DNA. Izo zikuchitika pa maziko a gulu kotenga. Komanso unakhazikitsidwa pa khromozomu mogwirizana maselo mwana wamkazi. mfundo koyamba imafalikira mu uthunthu wake ndipo sasintha. Ndi njira ya mitosis, anayala maziko a chitukuko cha zamoyo zimene zigwirizana maselo ambiri. Ndizachidziwikire kuti meiosis ndi mitosis, ngakhale pa cholinga limodzi, ndi kuchuluka yaikulu kusiyana ndi zotsutsana.