2024 Tus sau: Elizabeth Oswald | [email protected]. Kawg hloov kho: 2024-01-13 00:07
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.
Kev sib raug zoo tsis sib xws cuam tshuam li cas rau txhua zaus?
Qhov no yog qhov txiaj ntsig zoo: kev sib koom ua ke tsis sib xws, txawm tias nyob rau hauv daim ntawv loj tshaj plaws ntawm tus kheej fertilization, tsis muaj txiaj ntsig rau allele zaus. Selfing ua rau genotype zaus hloov pauv raws li qhov zaus ntawm homozygotes nce thiab qhov zaus ntawm heterozygotes txo qis, tab sis cov zaus allele tseem nyob tas li.
Yuav ua li cas yog qhov tseem ceeb ntawm kev sib tw tsis sib xws?
Qhov tseem ceeb ntawm kev sib tw tsis sib xws. Kev sib deev dimorphism (kev sib txawv ntawm ob tus poj niam txiv neej) tshwm sim los ntawm kev sib deev tsis sib xws. Cov txheej txheem yog ib rooj plaub tshwj xeeb ntawm kev xaiv ntuj hu ua kev xaiv kev sib deev. Kev xaiv kev sib deev tuaj yeem ua rau muaj kev cuam tshuam rau kev yug me nyuam ntawm cov tsiaj zoo sib xws.
Qhov cuam tshuam dab tsi tuaj yeem ua rau kev sib raug zoo tsis sib xws ntawm genotypes?
Kev sib koom ua ke thiab tsis sib koom ua ke tuaj yeem hloov pauv zaus ntawm genotypes uas tuaj yeem xaiv tau lossis tawm tsam los ntawm xwm. Genetic drift kuj tseem tuaj yeem ua rau muaj kev hloov pauv sai ntawm cov noob caj noob ces ntawm cov me me, cov noob caj noob ces.
yog dab tsipiv txwv ntawm kev sib tw tsis sib xws?
Muaj ntau ntau yam uas tsis sib haum xeeb tshwm sim. Ib qho laj thawj yog kev xaiv khub niam txiv yooj yim lossis xaiv kev sib deev; Piv txwv li, poj niam peahens yuav nyiam peacocks nrog loj dua tails.
Pom zoo:
Vim li cas kev sib raug zoo tsis txhais tias ua rau muaj kev cuam tshuam?
Kev ntsuas kev sib raug zoo rau kev sib raug zoo ntawm ob qhov sib txawv. Txawm li cas los xij, pom ob qhov sib txawv txav mus ua ke doestsis tas txhais tau tias peb paub seb ib qho txawv txav ua rau lwm qhov tshwm sim. Qhov no yog vim li cas peb feem ntau hais tias "
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).
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.
