Meiosis da mitosis: babban bambanci

All rayayyun kwayoyin halitta an hada da Kwayoyin cewa rayuwa rayukansu, share kuma girma. Rarraban tsari na iya faruwa a biyu gaba daya m hanyoyi da cewa suna da wannan bulan: meiosis da mitosis.

Domin rayayyun kwayoyin halitta wanda Kwayoyin dauke da wani tsakiya halayyar mitosis. Shi ne yawanci dabbobi, tsirrai da fungi. A kimiyya, da hanyar da rabo da aka kira vegetative yaduwa. Meiosis ne ma a hanyar da division, amma ta fasalin - halving da yawan chromosomes.

Bari mu fahimci bambancin da ke tsakanin mitosis daga meiosis. Kowane tsari ne irin wannan mataki, amma ga kowane daga cikinsu halayyar fasali, wanda su ne babban da bambance-bambance.

A mataki na farko - cikin fission tsari. A tsari ya shafi rarraba mitotic chromosomes. Kowace daga cikin wadannan biyu sabon siffofin, wanda aka rarraba tsakanin biyu Kwayoyin bayyana. Kimiyya ya tabbatar da cewa al'adar da sabon cell iya samun mabanbanta sakamako. Saboda haka, misali, za su iya ci gaba da raba ko raba zai ci gaba da daya cell. Zai yiwu ƙarshe na fission tsari a cikin biyu Kwayoyin lokaci guda.

meiotic tsari ne kadan daban-daban. Yana dogara ne a kan Ƙungiyarku biyu aza. Na farko shi ne tare da wani karu a yawan chromosomes daidai sau biyu. Diploid cell tsãgewar ƙwãyar cikin biyu haploid. Ga kowane chromosome ne halin gaban biyu chromatids. Na biyu division ba nufa wani karu a yawan chromosomes. A sakamakon haka, na biyu division suna kafa hudu sabon Kwayoyin. Kowane cell da aka sarrafa daya chromosome da wani chromatid. Meiosis da mitosis, duk da kamance, da bambance-bambance ne riga a mataki na farko.

Na biyu lokaci - Tasrifu. A farko cell division a lokacin meiosis ya shafi ƙungiya daga homologue chromosomes. mitosis aiwatar bambanta duka babu wani irin ma'abota. Wannan ne ya bi da jeri na chromosomes. Mitosis ne halin gaban guda biyu chromosomes, amma su uniform rarraba tare ekweita ba da nau'i-nau'i, amma dabam. Kamar wancan meiosis aiwatar kwakwalwa wani mabanbanta sakamako. Ga jeri tare ekweita wuce a nau'i-nau'i.

A kwatanta da matakai na mitosis da meiosis nuna cewa bambance-bambance bayyana ba kawai a cikin division, amma yana yiwuwa. Mitosis ya zama tushen samuwar ma'aurata da kuma somatic diploid Kwayoyin. Ya kamata a lura cewa a ko'ina cikin tsari ajiye hereditary dalilai. A sakamakon haka, abin da ya faru na meiosis, da nau'i-nau'i biyu kafa al'aura haploid Kwayoyin hali. Kamar yadda ga tambaya na gado, shi ba adana da kuma ƙarshe juyawa.

Duk da haka, babban bambanci da yake a cikin yanayi na aiwatar da haifuwa. Meiosis - aiwatar da jima'i haifuwa, wanda yawanci daukan wuri na musamman a cikin jam sel a cikin maturation mataki. Mitosis shi ne tushen asexual somatic Kwayoyin. Bugu da kari, shi ne kadai hanya zuwa mitosis for somatic Kwayoyin warke.

Bugu da kari, meiosis da mitosis ne gagarumin bambance-bambance a cikin yanayin da manufa. Meiosis yana tare da gyaran da akai yawan chromosomes kuma stimulates fitowan da sababbi. Suna hada da hereditary dalilai. Mitosis dogara ne a kan cire tallafin chromosomes. Yana faruwa a kan tushen tsaye division. Bugu da ari kafa a chromosome diverge ya Kwayoyin. A farko bayanai ne daukar kwayar cutar a gaba ɗayansa, kuma ba ya canza. Shi ne da aiwatar da mitosis, ya ba da dalilin ci gaban da kwayoyin cewa kunshi yawa Kwayoyin. Yana iya ƙarasa da cewa meiosis da mitosis, ko bi ta wata guda burin, da wata babbar adadin bambance-bambance da kuma hamayya da juna.