Video: Dab tsi tshwm sim nyob ib puag ncig chromosomes thaum mitosis?
2024 Tus sau: Miles Stephen | [email protected]. Kawg hloov kho: 2023-12-15 23:36
Plaub theem ntawm mob mitosis yog prophase, metaphase, anaphase thiab telophase (Daim duab hauv qab). Prophase: Cov chromatin, uas yog unwound DNA, condenses tsim chromosomes . Telophase: Lub spindle dissolves thiab lub hnab ntawv nuclear tsim ib ncig tus chromosomes hauv ob lub cev.
Ib yam li ntawd ib tug yuav nug, dab tsi cov ntaub ntawv nyob ib ncig ntawm cov chromosomes thaum kawg ntawm mitosis?
Telophase yog technically theem kawg ntawm mob mitosis . Nws lub npe muab los ntawm lo lus Latin telos uas txhais tau tias kawg . Thaum lub sij hawm no, tus muam chromatids ncav cuag tus ncej. Cov me me nuclear vesicles nyob rau hauv lub cell pib re- tsim ib ncig pawg ntawm chromosomes ntawm ib leeg kawg.
Ib sab saum toj no, yuav ua li cas rau chromosomes thaum lub sij hawm mitosis? Cov theem no yog prophase, prometaphase, metaphase, anaphase, thiab telophase. Thaum lub sij hawm mitosis , cov chromosomes , uas twb tau duplicated, condense thiab txuas rau spindle fibers uas rub ib daim ntawv ntawm txhua chromosome mus rau opposite sab ntawm lub cell. Qhov tshwm sim yog ob tug genetic zoo tib yam tus ntxhais nuclei.
Ib sab saum toj no, dab tsi theem ntawm mitosis ua chromosomes?
Mitosis yog cov txheej txheem ntawm kev faib cell, thiab muab cais ua plaub theem . Thaum lub sij hawm prophase, lub chromosomes condense thiab lub hnab ntawv nuclear dissolves. Thaum lub sij hawm metaphase, lub chromosomes nyob rau hauv nruab nrab ntawm lub cell. Thaum lub sij hawm anaphase, tus viv ncaus chromatids tau sib cais thiab rub mus rau qhov kawg ntawm lub cell.
Cov qauv dab tsi hauv prophase nrog rau cov chromosomes txav?
Thaum lub sij hawm prophase, chromatin condenses rau hauv chromosomes, thiab cov lub hnab ntawv nuclear , los yog daim nyias nyias, tawg. Nyob rau hauv cov tsiaj cell, lub cov centrioles nyob ze ntawm lub nucleus pib sib cais thiab txav mus rau cov ncej (sab) ntawm tes. Raws li cov cov centrioles txav mus, ib tug spindle pib tsim ntawm lawv.
Pom zoo:
Yuav ua li cas tshwm sim rau tam sim no nyob rau hauv ib tug parallel circuits thaum ntxiv qhov muag teev?
Raws li ntau qhov muag tau ntxiv, qhov tam sim no nce. Raws li ntau resistors ntxiv nyob rau hauv parallel, tag nrho tam sim no lub zog nce. Yog li ntawd, tag nrho cov tsis kam ntawm Circuit Court yuav tsum tau txo. Qhov tam sim no nyob rau hauv txhua lub teeb yog tib yam vim hais tias tag nrho cov qhov muag teev glowed nrog tib brightness
Qhov twg tshwm sim thawj lub teeb nyob ntawm qhov tshwm sim lossis lub teeb ywj pheej?
Lub Teeb-Dependent thiab Lub Teeb-Independent Reactions. Cov tshuaj tiv thaiv lub teeb, lossis cov tshuaj tiv thaiv lub teeb-dependent, yog thawj zaug. Peb hu lawv ob leeg thiab ob lub npe. Nyob rau hauv lub teeb-dependent tshwm sim ntawm photosynthesis, lub zog ntawm lub teeb propels lub electrons los ntawm ib tug photosystem mus rau lub high-zog lub xeev
Dab tsi ntawm chromosomes ua cov spindle fibers txuas rau txhawm rau txav cov chromosomes ncig?
Nws thiaj li, cov microtubules txuas los ntawm centrioles ntawm cov ncej ntawm lub xov tooj ntawm tes txuas mus rau txhua lub centromere thiab txhim kho mus rau hauv spindle fibers. Los ntawm kev loj hlob ntawm ib kawg thiab shrinking rau lwm yam, spindle fibers dlhos cov chromosomes raws nruab nrab ntawm lub cell nucleus, kwv yees li equidistant los ntawm spindle ncej
Yuav ua li cas tshwm sim thaum koj sib tov ib tug muaj zog acid nrog ib tug tsis muaj zog puag?
Hom 2: thaum muaj zog acid / base reacts nrog lub hauv paus tsis muaj zog / acid yog hydronium thiab hydroxyl ions tam sim no nyob rau hauv sib npaug amt ces ntsev thiab dej yog tsim thiab lub zog tso tawm uas tsawg tshaj li 57 kj / mole vim lub dissociation ntawm lub tsis muaj zog acid / puag uas feem ntau endothermic
Cov kauj ruam ntawm mitosis yog dab tsi thiab dab tsi tshwm sim hauv txhua qhov?
Mitosis muaj tsib theem sib txawv: interphase, prophase, metaphase, anaphase thiab telophase. Cov txheej txheem ntawm cell faib tsuas yog ua tiav tom qab cytokinesis, uas tshwm sim thaum lub sij hawm anaphase thiab telophase. Txhua theem ntawm mitosis yog tsim nyog rau cell replication thiab faib