Video: Nyob rau theem twg DNA nyuaj tshaj plaws pom nyob rau hauv lub tshuab tsom iav?
2024 Tus sau: Miles Stephen | [email protected]. Kawg hloov kho: 2023-12-15 23:36
DNA yog qhov nyuaj tshaj plaws kom pom ntawm prophase theem ntawm mitosis. Piav: Ntawm prophase theem, tsis zoo txhais chromosomes muaj nyob. DNA yog tam sim no nyob rau hauv daim ntawv ntawm nyias chromatin fibers uas nyuaj rau pom nyob rau hauv lub microscope.
Ib yam li ntawd, koj tuaj yeem nug, dab tsi theem yog DNA condensed nyob rau hauv?
Interphase tuaj yeem faib ua peb lub sijhawm: G1, S, thiab G2. G1 thiab G2 yog lub sijhawm uas cov txheej txheem ntawm tes txuas ntxiv mus li qub, thaum lub sijhawm S yog thaum DNA rov ua dua. Thaum lub sij hawm ntau ntawm mitosis, DNA yog qhwv thiab condensed rau hauv chromosomes (daim duab).
Ib yam li ntawd, koj puas tuaj yeem pom mitosis hauv qab lub tshuab tsom? Hauv cov duab kos hauv qab no , koj tuaj yeem pom cov chromosomes nyob rau hauv lub nucleus mus los ntawm tus txheej txheem hu ua mob mitosis , los yog faib. Yog koj muaj a microscope (400x) thiab ib tug zoo stained swb ntawm Dos hauv paus ntsis (los yog Allium paus ntsis), koj tuaj yeem pom cov theem hauv cov hlwb sib txawv, khov rau lub sijhawm.
Tsis tas li ntawd, vim li cas koj thiaj tsis pom DNA chromosomes thaum lub sij hawm interphase?
Tsis muaj , chromosomes yog tsis yog pom thaum tus Interphase ntawm cell cycle bcoz ntawm cov dej ntau hauv cov nucleus. Raws li cov ntsiab lus dej ntau dua hauv cov nucleus. lawv tshwm sim zoo li xov zoo li cov qauv hu ua chromatin, uas condenses (Loose water) los tsim cov qauv compact hu ua chromosomes.
Dab tsi theem cuam tshuam nrog kev sib cais ntawm tus muam chromatids?
anaphase
Pom zoo:
Lub lens twg yog siv rau hauv tsom iav raj?
Hom telescope no hu ua refracting telescope.Feem ntau refracting telescopes siv ob lub ntsiab lo ntsiab muag. Qhov loj tshaj plaws yog hu ua lub hom phiaj lens, thiab lub lens me dua siv rau kev saib yog hu ua eyepiece lens
Nyob rau theem twg DNA nyuaj tshaj plaws kom pom nyob rau hauv lub tshuab tsom iav?
DNA yog qhov nyuaj tshaj plaws kom pom ntawm prophase theem ntawm mitosis. Kev piav qhia: Nyob rau theem prophase, tsis muaj cov chromosomes txhais tau zoo. DNA yog tam sim no nyob rau hauv daim ntawv ntawm nyias chromatin fibers uas nyuaj rau pom nyob rau hauv lub microscope
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