Video: Ib qho piv txwv ntawm tsev neeg gene yog dab tsi?
2024 Tus sau: Miles Stephen | [email protected]. Kawg hloov kho: 2023-12-15 23:36
Gene tsev neeg : Ib pawg ntawm noob uas muaj feem xyuam rau hauv cov qauv thiab feem ntau hauv kev ua haujlwm. Cov noob hauv a tsev neeg gene yog xeeb leej xeeb ntxwv noob . Rau piv txwv , hemoglobin noob nyob rau ib tsev neeg gene uas yog tsim los ntawm noob duplication thiab divergence.
Tib neeg kuj nug tias, cov tsev neeg gene tsim li cas?
A tsev neeg gene yog ib txheej ntawm ob peb zoo sib xws noob , tsim los ntawm duplication ntawm ib tus thawj noob , thiab feem ntau nrog cov haujlwm biochemical zoo sib xws. Ib yam li ntawd tsev neeg yog cov noob rau tib neeg hemoglobin subunits; lub kaum noob nyob rau hauv ob pawg ntawm cov chromosomes sib txawv, hu ua α-globin thiab β-globin loci.
Dab tsi yog ib tsev neeg multigene muaj li ntawm? Kev txhais ntawm ntau tsev neeg Lub sij hawm ntau tsev neeg yog dav siv los suav nrog cov pab pawg ntawm cov noob los ntawm tib lub cev uas encode cov proteins uas muaj cov kab ke zoo sib xws los ntawm lawv qhov ntev lossis txwv rau ib qho tshwj xeeb.
Hais txog qhov no, hom genes yog dab tsi?
Cov kab mob muaj peb hom caj ces : structural, operator, thiab regulator. Cov qauv tsim noob code rau synthesis ntawm tej polypeptides. Tus neeg ua haujlwm noob muaj cov cai tsim nyog los pib cov txheej txheem ntawm kev sau cov lus DNA ntawm ib lossis ntau yam qauv noob ua mRNA.
Vim li cas cov tsev neeg gene tseem ceeb?
Population genetics txoj kev xav ntawm tus kheej coefficients ntawm noob cov tswv cuab ntawm a tsev neeg gene qhia tau hais tias qhov sib npaug ntawm kev sib txawv los ntawm kev hloov pauv, thiab homogenization los ntawm kev sib txawv tsis sib xws thiab noob conversion, yog tseem ceeb . Tsis tas li ntawd, evolution ntawm cov haujlwm tshiab yog vim noob duplication ua raws li qhov sib txawv.
Pom zoo:
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