2024 Tus sau: Elizabeth Oswald | [email protected]. Kawg hloov kho: 2024-01-13 00:07
Qhov kev hloov pauv caj ces uas tshwm sim hauv cov pej xeem vim mutation yog random - tab sis kev xaiv ua raws li qhov kev hloov pauv hauv txoj kev tsis sib xws: cov noob caj noob ces uas pab ciaj sia thiab yug me nyuam. feem ntau yuav dhau los ua ntau dua li qhov sib txawv uas tsis yog. Kev xaiv ntuj tsis yog random!
Yuav hloov pauv li cas?
Ib yam lus, mutations tshwm sim los ntawm kev hwm seb lawv cov teebmeem puas muaj txiaj ntsig. Yog li, cov txiaj ntsig DNA hloov pauv tsis tshwm sim ntau zaus vim tias lub cev tuaj yeem tau txais txiaj ntsig los ntawm lawv.
Puas hloov pauv hloov pauv lossis random?
Summary: Evolutionary theory hais tias kev hloov pauv yog qhov muag tsis pom thiab tshwm sim randomly. Tab sis nyob rau hauv qhov tshwm sim ntawm kev hloov pauv hloov pauv, cov hlwb tuaj yeem saib hauv qab qhov muag tsis pom, nce lawv qhov kev hloov pauv hauv cov lus teb rau kev ntxhov siab.
Yuav hloov pauv tsis yog-random?
Yog li, txawm hais tias kev hloov pauv feem ntau xav tias yuav tshwm sim ntawm nws tus kheej ntawm lawv cov txiaj ntsig kev noj qab haus huv, nws pom tau tias qhov hloov pauv hauv zos lawv tus kheej tuaj yeem hloov zuj zus, ua rau cov genomes uas muaj kev hloov pauv tshwm sim tsis yog-randomly: ntau zaus qhov twg lawv feem ntau muaj txiaj ntsig thiab tsawg dua qhov lawv feem ntau …
Puas yog kev hloov pauv ib txwm muaj?
Abstract. Ib lub ntsiab lus tseem ceeb ntawm Modern Evolutionary Synthesis (1930s-1950s), thiab qhov kev pom zoo ntawm cov kws tshawb fawb txog biologist txog tam sim no, yog tias txhua yam kev hloov pauv caj ces tshwm sim los ntawm "ceev" lossis ntawm"random" nrog rau kev hloov kho.
Pom zoo:
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).
Puas yog jurassic ntiaj teb hloov pauv hloov pauv hloov pauv?
Qee zaum, paub meej, koj yuav tau rov qab mus rau lub sijhawm dhau los - txuag manually, thiab feem ntau, raws li game's autosave yog… tsis zam txim - tab sis feem ntau ntawm cov lub sijhawm koj tuaj yeem khaws cov khoom thiab khaws cia nrog.
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?
Los ntawm kev hloov pauv hloov pauv hloov pauv?
Kev hloov pauv hloov pauv hloov pauv (TMA) yog qhov isothermal (tsis hloov pauv nucleic acid kub), ib leeg-tube nucleic acid amplification system siv ob lub enzymes, RNA polymerase thiab thim rov qab kev sau ntawv. … Cov txheej txheem no tuaj yeem siv los tsom rau RNA thiab DNA.
