Video: Puas Natural Selection nce allele zaus?
2024 Tus sau: Miles Stephen | [email protected]. Kawg hloov kho: 2023-12-15 23:36
Thaum ib tug phenotype tsim los ntawm tej yam alleles pab cov kab mob muaj sia nyob thiab yug me nyuam zoo dua li lawv cov phooj ywg, natural xaiv ua tau nce tus zaus ntawm qhov pab tau alleles los ntawm ib tiam mus rau lwm tiam - uas yog, nws tuaj yeem ua rau microevolution.
Yog li ntawd, kev xaiv ntuj yuav cuam tshuam li cas rau allele zaus?
Ntuj xaiv kuj cuam tshuam rau allele zaus . Yog ib allele confers ib phenotype uas ua rau ib tug neeg kom muaj sia nyob zoo dua los yog muaj cov xeeb ntxwv ntau dua, cov zaus ntawm qhov ntawd allele yuav nce.
Tom qab, lo lus nug yog, yuav ua li cas xaiv ntuj raug cuam tshuam rau allele frequencies quizlet? Ntuj xaiv ntawm ib leeg-gene zoo tuaj yeem ua rau muaj kev hloov pauv hauv allele zaus thiab, yog li, hloov pauv hauv phenotype zaus . Nyob rau tib lub sijhawm, muaj kev pheej hmoo tshwm sim tuaj yeem ua rau muaj allele los ua ntau los yog tsawg dua hauv cov neeg.
Tom qab ntawd, kev xaiv tej yam ntuj tso cuam tshuam li cas rau qhov zaus ntawm cov cwj pwm hauv cov pej xeem?
Ntuj xaiv tsuas yog ua rau ntawm cov pejxeem cuab yeej cuab tam yam ntxwv : xaiv rau cov txiaj ntsig alleles thiab, yog li, nce lawv zaus hauv pej xeem , thaum xaiv tawm tsam deleterious alleles thiab, yog li, txo lawv zaus.
Yuav ua li cas kom ib tug allele zaus nce?
Cov kev hloov pauv hauv cov txheeb ze allele zaus , hu ua genetic drift, ua tau los yog nce los yog txo los ntawm lub sij hawm. Thaum nws pib, genetic drift yuav txuas ntxiv mus kom txog rau thaum muaj kev koom tes allele yog poob los ntawm cov pejxeem los yog tib leeg xwb allele tam sim no ntawm ib qho tshwj xeeb noob qhov chaw nyob hauv ib haiv neeg.
Pom zoo:
Yuav ua li cas koj xam qhov zaus ntawm zaus thiab feem pua?
Ua li no, faib cov zaus los ntawm tag nrho cov txiaj ntsig thiab muab faib los ntawm 100. Hauv qhov no, qhov zaus ntawm thawj kab yog 1 thiab tag nrho cov txiaj ntsig yog 10. Qhov feem pua yog tom qab ntawd yog 10.0. Cov kab kawg yog qhov feem pua Cumulative
Yuav ua li cas koj xam allele zaus?
Ib qho allele zaus yog xam los ntawm kev faib cov naj npawb ntawm lub sij hawm qhov allele ntawm kev txaus siab tau pom nyob rau hauv cov pej xeem los ntawm tag nrho cov ntawv luam ntawm tag nrho cov alleles ntawm qhov tshwj xeeb genetic locus nyob rau hauv cov pejxeem. Allele frequencies tuaj yeem sawv cev ua tus lej, feem pua, lossis ib feem
Yuav ua li cas koj xam allele zaus tom qab xaiv?
Txij li p + q = 1, ces q = 1 - p. Qhov zaus ntawm A alleles yog p2 + pq, uas sib npaug p2 + p (1 - p) = p2 + p - p2 = p; uas yog, p nyob ib yam ntawm ib tiam mus rau lwm tiam. Qhov zaus ntawm AA tus neeg yuav yog p2. Qhov zaus ntawm Aa cov neeg yuav yog 2pq. Qhov zaus ntawm aa tus neeg yuav yog q2
Puas yog cov viscosities ntawm magmas nce nrog nce feem pua ntawm silica?
Lub viscosities ntawm magmas nce nrog nce feem pua ntawm silica. Kev tawg ntawm Hawaii volcanoes tej zaum yuav piav raws li tawg nyob rau hauv piv rau 1980 Mount St. Helens eruption. Basaltic lavas feem ntau yog kub dua thiab khov dua li andesite lavas
Dab tsi yog lub ntsiab lus ntawm kev hloov pauv lom neeg hauv cov ntsiab lus ntawm allele zaus?
Microevolution, los yog evolution ntawm ib tug me me, yog txhais raws li ib tug kev hloov nyob rau hauv lub zaus ntawm noob variants, alleles, nyob rau hauv ib tug pej xeem ntau tiam. Lub teb ntawm biology uas kawm txog allele frequencies nyob rau hauv cov pejxeem thiab yuav ua li cas lawv hloov lub sij hawm yog hu ua pej xeem noob caj noob ces