2024 Tus sau: Elizabeth Oswald | [email protected]. Kawg hloov kho: 2024-01-13 00:07
Muaj peb hom kev sib koom ua ke ntawm kev hloov pauv:
- Kev txhais lus (a slide)
- Kev tig (ib tig)
- Reflection (ib tug flip)
Yuav ua li cas hloov pauv ib txwm ua rau cov duab sib xws?
Peb tam sim no paub tias kev hloov pauv nruj (kev xav, kev txhais lus thiab kev sib hloov) khaws qhov loj thiab cov duab ntawm cov duab. Ntawd yog, daim duab ua ntej thiab daim duab yeej ib txwm sib haum.
Kev hloov pauv dab tsi tsis ua rau muaj kev sib koom ua ke?
2 Teb Los Ntawm Cov Kws Qhia Ntawv
Kev xaiv tsuas yog hloov pauv qhov loj ntawm daim duab yog tsab ntawv a) dilation thiab yog li ntawd, tsim ob daim duab uas tsis sib haum. Lwm qhov kev xaiv peb tsuas yog "txav" ib qho duab mus rau qhov chaw tshiab (piv txwv li tig, txhais, lossis xav txog) thiab ua rau muaj qhov sib koom ua ke.
Yuav ua li cas ntawm kev hloov pauv ua ib daim duab zoo sib xws?
Cov kev hloov pauv uas ib txwm tsim cov duab sib xws yog Kev txhais, kev xav, thiab kev sib hloov. Cov kev hloov pauv no yog isometric, yog li, cov duab tsim tau ib txwm sib haum xeeb rau cov duab qub. Kev hloov pauv uas qee zaum tsim cov duab sib xws yog dilation.
Kev hloov pauv dab tsi qhia pom tias muaj kev sib haum xeeb?
Qhov kev hloov pauv twg yuav ua rau muaj cov duab sib xws? Kev sib hloov, kev xav, thiab kev txhais lus yog isometric. Qhov ntawd txhais tau hais tias cov kev hloov pauv no tsis uahloov qhov loj ntawm daim duab. Yog hais tias qhov loj thiab cov duab ntawm daim duab tsis hloov, ces cov duab yog congruent.
Pom zoo:
Dab tsi yog qhov hloov pauv thiab hloov pauv hloov pauv?
Point mutations hloov ib leeg nucleotide. Frameshift kev hloov pauv yog ntxiv lossis tshem tawm ntawm nucleotides uas ua rau muaj kev hloov pauv hauv kev nyeem ntawv. frameshift thiab point mutation yog dab tsi? Ib qho kev hloov pauv cuam tshuam rau ib khub hauv paus.
Qhov kev hloov pauv no puas yuav ua rau muaj kev hloov pauv hloov pauv?
Yog li, yog tias muaj kev hloov pauv, piv txwv li, kev ntxig lossis tshem tawm ntawm nucleotide, tshwm sim, qhov no tuaj yeem ua rau kev hloov pauv ntawm kev nyeem ntawv. Nws hloov tag nrho cov amino acid ib ntus. Cov kev hloov pauv no yog hu ua frameshift mutation (tseem hu ua kev nyeem ntawv hloov pauv, nyeem ntawv hloov pauv, lossis framing yuam kev).
Kev sib raug zoo tsis sib xws cuam tshuam li cas rau kev hloov pauv?
Raws li qhov kev ntxub ntxaug yog cov noob caj noob ces, evolution feem ntau yog qhov tshwm sim. Kev sib tw tsis sib xws tuaj yeem ua raws li cov txheej txheem ntxiv rau kev xaiv ntuj tsim kom muaj kev hloov pauv. Txhua qhov kev tawm mus los ntawm kev sib raug zoo sib xws ua rau muaj kev sib npaug ntawm cov genotypes hauv cov pejxeem.
Qhov twg yog qhov kev hloov pauv hloov pauv hloov pauv?
Semiconservative replication piav qhia txog cov txheej txheem ntawm DNA replication nyob rau hauv tag nrho cov paub hlwb. DNA replication tshwm sim ntawm ntau lub hauv paus pib ntawm kev rov ua dua raws DNA qauv strand. Raws li DNA ob chav helix yog unwound by helicase, replication tshwm sim nyias ntawm txhua tus qauv strand nyob rau hauv antiparallel cov lus qhia.
Qhov kev hloov pauv twg yog xav tias yuav cuam tshuam los ntawm kev hloov pauv hloov pauv?
Dependent Variable Qhov sib txawv uas nyob ntawm lwm yam uas ntsuas. Cov kev hloov pauv no yuav tsum tau hloov pauv raws li qhov kev sim ua haujlwm ntawm tus kheej hloov pauv lossis hloov pauv. Nws yog cov nyhuv presumed. Qhov kev tshawb fawb hloov pauv twg yog qhov tshwm sim?
