Video: Yuav ua li cas yog lub npe rau qhov chaw ntawm kev hla nyob rau hauv ib tug chromosome?
2024 Tus sau: Miles Stephen | [email protected]. Kawg hloov kho: 2023-12-15 23:36
Hla mus tshwm sim ntawm prophase I thiab metaphase I thiab yog txheej txheem uas ob homologous chromosome non-viv ncaus chromatids ua ke nrog ib leeg thiab sib pauv sib txawv ntawm cov khoom siv caj ces los ua ob lub recombinant chromosome tus muam chromatids.
Tib neeg kuj nug, kev hla kuj hu ua dab tsi?
Hla mus yog ib lub tswv yim tseem ceeb ntawm noob caj noob ces thiab cell biology, feem ntau hu ua recombination. Nws tshwm sim thaum meiosis. Hla mus yog kev sib pauv ntawm chromosome ntu ntawm non-viv ncaus chromatids thaum lub sij hawm tsim gametes.
Kuj Paub, nws hu ua dab tsi thaum chromosomes pauv qhov zoo? Chromosomal crossover. Homologous recombination yog txheej txheem uas ob chromosomes , ua ke thaum lub sij hawm prophase 1 ntawm meiosis, pauv qee qhov distal ntawm lawv DNA. Yog hais tias lawv tawg ntawm tib qhov chaw los yog qhov chaw nyob rau hauv ib theem zuj zus ntawm lub hauv paus khub, qhov tshwm sim yog ib qho pauv ntawm cov noob caj noob ces, hu ua genetic recombination.
Txog qhov no, puas tuaj yeem hla dhau ntawm cov chromosomes nonhomologous?
Nws ua tau heev. Qhov no yog hu ua translocation. Thaum twg nonhomologous chromosomes yog matched los ntawm kev huam yuaj, cov chromosomes ntoo khaub lig dhau nyob rau hauv ib tug nonsymmetrical zam.
Kev ywj pheej assortment txhais li cas?
Txhais ntawm ywj siab assortment .: kev tsim ntawm kev sib txuas ntawm chromosomes hauv meiosis thiab cov noob ntawm cov khub sib txawv ntawm homologous chromosomes los ntawm txoj cai raws li txoj cai ntawm qhov tshwm sim ntawm ib qho ntawm txhua tus diploid khub ntawm homologous chromosomes rau hauv txhua gamete ywj siab ntawm ib leeg khub.
Pom zoo:
Dab tsi yog qhov kev hloov pauv ntawm cov khoom uas txav ntawm qhov chaw mus rau qhov chaw ntawm - 12 m?
Kev piav qhia: Qhov kev txav ntawm ib qho khoom txav ntawm qhov chaw mus rau qhov chaw ntawm − 12 m yog 12 meters. Qhov kev ncua deb ntawm lub hauv paus chiv keeb mus rau qhov siab tshaj plaws txoj hauj lwm yog hu ua displacement ntawm ib yam khoom. Qhov siab tshaj plaws kev hloov pauv ntawm cov khoom nyob rau hauv ib nthwv dej yog hu ua crest thiab qhov tsawg kawg nkaus hloov pauv yog hu ua trough
Lub organelle twg ua haujlwm raws li qhov chaw xa ntawv ntawm lub xov tooj ntawm tes txheeb cov proteins thiab xa lawv mus rau lawv qhov chaw xav tau sab hauv lossis sab nraud ntawm tes?
Golgi Hais txog qhov no, dab tsi organelle yog lub luag haujlwm rau kev thauj mus los? endoplasmic reticulum (ER Qhov thib ob, cov proteins txav mus los ntawm lub cell li cas? Cov proteins txav mus los endomembrane system thiab raug xa tawm los ntawm lub ntsej muag trans ntawm Golgi apparatus nyob rau hauv thauj vesicles uas txav mus los cytoplasm thiab tom qab ntawd fuse nrog plasma membrane tso tawm protein ntau mus rau sab nraum lub cell .
Yuav ua li cas yog lub sum ntawm cov atomic masses ntawm tag nrho cov atoms nyob rau hauv ib tug qauv rau ib tug compound?
Cov mis loj ntawm ib yam khoom yog qhov sib npaug ntawm qhov nruab nrab atomic masses ntawm txhua lub atom sawv cev hauv cov tshuaj formula thiab qhia nyob rau hauv atomic mass units. Cov mis loj ntawm covalent compound tseem hu ua molecular mass
Lub hauv paus qhov chaw txoj kev xav tau zoo li cas rau cov neeg nyob hauv thaj chaw?
Central qhov chaw txoj kev xav. Central qhov chaw txoj kev xav yog ib txoj kev xav ntawm thaj chaw uas nrhiav kev piav qhia tus lej, qhov loj thiab qhov chaw ntawm tib neeg kev nyob hauv ib qho chaw nyob. Nws tau tshaj tawm xyoo 1933 los piav qhia txog kev faib tawm ntawm cov nroog thoob plaws toj roob hauv pes
Yuav ua li cas koj nrhiav tau qhov chaw ntawm lub voj voog nyob rau hauv ib tug conic seem?
Tus nqi ntawm r yog hu ua 'radius' ntawm lub voj voog, thiab qhov taw tes (h, k) hu ua 'center' ntawm lub voj voog. (h, k) = (0, 0), ces qhov sib npaug simplifiesto x2 + y2 = r2