Nā kūlana o ka mitosis: lākou mau 'ano. Meaning o mitotic aeea mahele

Na aeea kalapona - ka manawa, mai kekahi aeea mahele i ka mea e hiki mai ana. Ua lawe wahi i loko o nā ka mea i hahai ana ka mea mamuli o kekahi kahua o ka hoʻonaʻauao - interphase, a me ka pono mahele. Ka lōʻihi like 'ole o kēia kaʻina hana i kekahi ke kaumaha ma muli o ka' ano o ke keena.

Interphase mea he wā ma waena o nā aeea moku, no ka manawa, mai ka mahele hope e aeea ka make a me ka poho o ka pono i ka mahele.

Ma keia manawa, o ka halepaahao ulu a me ka lua mai kona DNA, like hoʻi me mitochondria a me plastids. I interphase ae kumuʻiʻo hoʻololi kemikala , a me ka 'ē aʻe ke aloha i huiʻia. Ka loa intensively hoʻololi kemikala kaʻina ua hōʻike ma hoʻololi kemikala interphase. I keia manawa, papalua nukelea chromatids, ua waiho waho ikehu mea e e hoʻohana i ka mahele. Nō hoʻi, he ulu ka helu o ka halepaahao organelles a me centrioles.

Interphase ninoaaeyao aneane 90% o ka halepaahao pōʻaiapuni. Ma hope o ka mea ae mitosis, i mea no ka papa kuhikuhiE ala o ka papa o eukaryotic aeee (meaola nona na keena iloko o ka nucleus hana).

Ma mitosis, na chromosomes Punk, a hana i ka kūikawā i hoʻomākaukauʻia, i mea kuleana no kaʻaʻahu o ka makana o aaiaoe 'ike ma waena o aeee i i hanaʻia ma kēia kaʻina.

Cell mahele i wahi i loko o kekahi mau kahua o ka hoʻonaʻauao. mitotic ke kahua wehewehe aku e kanaka, 'ano a me ka kekahi lōʻihi like' ole.

Nā kūlana o ka mitosis

I ka aeee undergo mitosis like kūlana o ka mitosis: prophase, metaphase ma hope o ka mea e hele ai, anaphase, telophase mea hope.

mitotic pae wehewehe aku ma na kēia mau hiʻona:

• prophase - nalo i ka nukelea wahī. Ma keia pae, na centrioles diverge i ka auamo o ka halepaahao, a chromosomes Punk (olelo hoopomaikai);
• metaphase - E ho ohana i wehewehe aku maximally kana olelo hoopomaikai chromosomes mea i hakuʻia no nā chromatids ma ka equator (waena) aeea. O kŰia ua kapaia ka metaphase una. He hiki ke nana chromosomes ma lalo o ka microscope e pono e hōʻike 'ia. Ma metaphase o mitosis mākaukau kaua paha ma kekahi hoʻopili aku i kekahiʻaoʻao o ka kālī pae paha i centromeres o chromosomes'ē aʻeʻaoʻao - i ka centrioles.
• anaphase - hōʻike o ke kaawale ana o na chromosomes i loko o nā chromatids (ka mea lūlū aku i kekahi mau auamo). Pela chromatids lilo kaawale chromosomes, a iloko o ka hoʻokahi wale chromatid pae;
• telophase - wehewehe aku decondensation chromosomes a me ke kahua a puni kēlā me kēia chromosome o ka hou nukelea wahī. kālī filament nalo ma ka nucleus ikea nucleoli. I telophase a me ka cytokinesis ala, i mea ka mahele o ka cytoplasm ma waena o ke kaikamahine keena. Kēia kaʻina ua lawe mai i na holoholona aie i ka mea kūikawā cleavage hewa elua (pūhaka, a i hookaawale ai i ka halepaahao i loko o nā). I kanu keena hoakaka aeea cytokinesis kaʻina papa me ka Golgi luna '.

He aha ka ka liluwelo manaʻo nui o ka mitosis kaʻina?

Nā kūlana o ka mitosis kōkua pololei EYI o aaiaoe 'ike i ke kaikamahine keena, nānā' ole i ka helu o ka papa. Penei loaa kēlā o ia chromatid e kōkua malama hana mau helu o chromosomes i loko o nā mea a pau aeee i i hanaʻia ma ka mahele ana i kekahi. Ua hāʻawi EYI o mitosis mea hānai 'ia paha o aaiaoe mea.