Video: Lub hom phiaj ntawm transposon yog dab tsi?
2024 Tus sau: Miles Stephen | [email protected]. Kawg hloov kho: 2023-12-15 23:36
A transposable element (TE, transposon , los yog dhia gene) yog DNA ib ntus uas tuaj yeem hloov nws txoj haujlwm hauv ib lub genome, qee zaum tsim lossis thim rov qab kev hloov pauv thiab hloov pauv ntawm lub xovtooj ntawm cov noob caj noob ces thiab qhov loj ntawm genome. Transposons kuj tseem muaj txiaj ntsig zoo rau cov kws tshawb fawb los ua ib txoj hauv kev los hloov DNA hauv cov kab mob uas muaj sia nyob.
Ib yam li ntawd, nws raug nug, ua li cas transposons ua haujlwm?
Transposons yog mutagens. Lawv tuaj yeem ua rau muaj kev hloov pauv hauv ntau txoj hauv kev: Yog tias a transposon inserts nws tus kheej mus rau hauv ib tug functional gene, nws tej zaum yuav puas. Kev nkag mus rau hauv exons, introns, thiab txawm tias mus rau hauv DNA flanking cov noob (uas yuav muaj cov neeg txhawb nqa thiab txhim kho) tuaj yeem rhuav tshem lossis hloov pauv cov noob caj ces.
Ib tug kuj yuav nug, dab tsi yog junk DNA siv rau? Hauv genetics, lub sij hawm DNA nkos hais txog thaj tsam ntawm DNA uas tsis yog-coding. Qee qhov no tsis yog coding DNA yog siv rau tsim noncoding RNA Cheebtsam xws li hloov RNA, tswj RNA thiab ribosomal RNA.
Ib tug kuj yuav nug, dab tsi yog ob hom kev transposons?
Txij li thaum McClintock qhov kev tshawb pom, peb hom kev hloov pauv tau raug txheeb xyuas. Cov no suav nrog hoob II transposons, me me inverted-repeat cov ntsiab lus transposable (MITEs, lossis class III transposons), thiab retrotransposons (chav I transposons).
Transposon Quizlet yog dab tsi?
transposons . interspersed dua DNA sequences uas yuav txav mus rau hauv lub genome. (aka jumping noob, transposable khoom, mobile DNA ntsiab)
Pom zoo:
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