Potoloho ea bophelo ea lisele - nako ea tsoetsoeng a lona ho etsa karohano ikemetseng kapa lefu

Potoloho ea bophelo ba lisele tse - nako ya tsa motheo unit trust oa ba phelang ho tswa ho thehoa feela lona karohano tsa lona tsa karohano kapa lefu. Ho akarelletsa liphetoho tsohle tsa tlhaho tse feta organelles phetha mesebetsi ea eona.

Ho itšetlehile ka hore mokhatlo o hlophisitsoeng oa le ee rileng tekanyetso lona seleng ea potoloho ka tšoarella ka metsotso e 30 le matsatsi a 3. Ka mohlala, ha sithabetsa lisele ka echinoderms potoloho ea bophelo ba ke metsotso e 30, 'me epidermis mala batho - ka lihora tse 12. Ho na le boetse ho na le bao ba diyuniti tsa motheo tsa phelang, eo e sa aroloa, ke hore, u se ke ua ikatisa, ba phetha mosebetsi bona reretsoe le shoa - .. tse kang methapo ea kutlo, striated likhoele mesifa. Self potoloho bophelo seleng ea ka aroloa linako tse peli: interphase, kapa nako ea ho hōla le ho mitosis - nako karohano. Interphase se akarelletsa, ka ho latellana, 'maloa tsa mekhahlelo e:

1. G1 (postmitotic) - ea pele kgolo ya mohato. Mothating ona, phuthehong ea mRNA, liprotheine le dikarolo tse ding seleng.
2. S (a maiketsetso a) - le hlaha DNA boikatiso, leng isang ea palopedi boitsebiso bo liphatseng tsa lefutso. Qetellong ea mohato tse peli tsa e tšoanang foromo DNA habeli Helix. E mong le e ba palesa ea acid e deoxyribonucleic kenyelletsa ditokiseletso khale spiral e mong, 'me ea bobeli - e ncha, e leng ile ha thehoa ka lebaka la complementarity.
3. G2 (premitotic) - ke ho lokisa thulaganyong, e akarelletsang khalemelo ea liphoso entse nakong DNA tswakana ka mohato fetileng. Ipokellela limatlafatsi tse ngata, matla, tsoela pele ho synthesize liprotheine le RNA.

Karolo ea bohlokoa ke ea ho ikatisa mitotic potoloho ea seleng ea proliferative kapa eo e qala ka ho toba ka mor'a G2. Ho sete ya dithulaganyo tse etsahalang ka tsa motheo mehaho ya ka yuniti ya phelang ho tswa karohano e mong ho pheletsong e 'ngoe le theha le moloko o mocha oa lisele tse tlaasana. Mitosis ke mofuta o ka sehloohong oa karohano somatic (ha ho kopanela ho ikatisa thobalano) ya diyuniti tsa motheo tsa phelang nyutlelie.

Potoloho ea bophelo ea lisele bohlokoa bakeng sa 'mele, ho fana ka tšireletseho ea palo le sebopeho sa chromosomes bath ea e mong le mefuta e (karyotype), gore e tle e habohlokoa hore linako tsohle karohano li fetile ntle pherekano leha e le efe. Mitosis e entsoe ka mekhahlelo e 4 latellanang:

1. Prophase. Nakong ena, karohano seleng e le hlaha 'me le lumellane ho teng pakeng tsa lipalo centrioles, tse ya kokangana ke karohano ea leakage radiation. Ho ea qetellong ea nako ena nucleoli putlama chromosome thatafetseng le shortened, i.e. ke condensation bona.
2. Metaphase. sebopeho Nucleoprotein tsamaiso di nyalantswe hammoho lisele ho equator thehoa metaphase poleiti. Tluoa tabeng ea ho constriction e ka sehloohong ea chromosomes ena. Joale, e mong oa bona e arotsoe chromatids tse peli.
3. Anaphase. Ka mohato ona obrazovashiesya chromosomes morali fallela lipalo fapaneng, moo ba a bataletse 'me ba unwind.
4. Telophase. Tsosolositsoeng e nucleolus le ea mantlha arola cytoplasm se hlahile.

Kahoo, ka seleng potoloho - nako ya bophelo ho tloha tsoala tsa motheo unit trust sa lefu la ba phelang.