Mene ne mitosis, ta saukarwa, iri da kuma darajar

A lokacin haihuwa ayyuka na rayayyun kwayoyin halitta akwai cell division. Mitosis - shi ne mafi kowa Hanyar haifuwa na eukaryotic Kwayoyin ta hanyar da kai tsaye ba division. Ta nazarin halittu rawa ne ko da rarraba chromosomes tsakanin m ya nuclei cewa tsiraru da tabbatar da samuwar wani m kayyade iri Kwayoyin da kuma tabbatar da aminci da layi na gadar hali a m ƙarnõni na sel.

Mene ne mitosis? Yana da wani muhimman hakkokin aiwatar mutum ci gaban da kwayoyin da kuma ta m canji game da morphological, physiological da biochemical, wanda, a cikin tara, shi ne ontogenesis. Saboda miotic division qara yawan jama'a na vegetative Kwayoyin na asali. Da rabo daga kwan da ya hadu da ci gaba da girma na dabba nama ya auku a kan wannan manufa.

Mataki miotic division

A tsawon lokaci da mitosis dabba nama yana zuwa 60 minutes, a shuka kyallen takarda - har zuwa 3 hours. Mitosis kuma lokaci dangane da morphological Properties yanaye za a iya raba 5 lokaci, da barin igiyoyi don kafa abin mitosis:

1. Prophase - mataki miotic division characterizing karkace chromosomes na biyu chromatids kama na'ura, bi da samuwar mitosis.

2. prometaphase - core harsashi tsawon m Lalacewar cikin kananan sassa cewa su ne m ga endoplasmic reticulum.

3. Metaphase - miotics m cell division mataki, kunsha na biyu lokaci: metakineza - taro chromosomes a mitotic dogara sanda a cikin nau'i na Equatorial farantin - da kuma rabuwa na chromosomes a chromatids.

4. Anaphase - mai sauri fission lokaci a lokacin da chromatids rabu da kuma rarraba zuwa daura sanduna. Wannan ya faru ne kawai 'yan mintoci.

5. Telophase - karshe mataki na mitosis, a cikin abin da motsi aka tsaya a lokacin chromosomes karya myotic inji suna kafa ya nucleoli, makaman nukiliya membrane aka kafa da aka raba cell jiki cikin biyu m raka'a.

iri mitosis

Mene ne mitosis da abin da yake nau'ukanta? More daidai, yana yiwuwa su kafa wata hanyar sanin da irin. Ganin musamman bayani dalla-dalla na mitosis, wanda bayyana kanta a daban-daban kungiyoyin na division, wasu iri amfaninsa, zartar da daya ya canza matsayin, ba su yi daidai da sauran mutane. Daya daga cikin key halaye amfani a kafa da typology na mataki ne halayyar da makaman nukiliya ambulan, wanda aka raba shi da girmamawa tare da su gudanar iri uku mitosis:

1. Na cikin gida mitosis halin a cewa samuwar na dogara sanda da kuma m division auku ba tare da lalata ta ambulan cikin tsakiya.

2. Outdoor mitosis ƙaddara da Lalacewar nukiliya membrane a lokacin cell division.

3. Semi-rufe mitosis. Abin da mitosis na da irin wannan za a iya ƙaddara daga lalace ambulan na musamman miotics dogara sanda sandunan, tare da consequent samuwar "windows polarity."

Wani fassara halayyar irin mitotic dogara sanda da hidima a matsayin irin fasali. Game da wannan halayyar a cikin na asali ilmin halitta Concepts raba:

- plevromitoza (a lokacin da dogara sanda symmetrically ko asymmetrically kunshi sassa biyu).

- ortomitoza (a lokacin da gano fasali bipolar dogara sanda da aka kafa a metaphase Equatorial farantin).

Ma'ana mitosis

A lokacin mitosis auku haifuwa m Kwayoyin. Yana da wani muhimmanci ga kayan aiki da adana daga cikin chromosome sa. Babban muhimmancin mitosis al'amari na kwashe bayanan jinsi. Wannan tsari rinjayar da girma da kuma ci gaba, motsi na Kwayoyin, farfadowa da sake yiwuwar tohowarsu.