Cov txheej txheem:
Video: Dab tsi yog ob hom kev hloov pauv ntawm cov ntsiab lus?
2024 Tus sau: Miles Stephen | [email protected]. Kawg hloov kho: 2023-12-15 23:36
Muaj ob hom kev hloov pauv hloov pauv : kev hloov kev hloov pauv thiab kev hloov pauv kev hloov pauv . Kev hloov pauv kev hloov pauv tshwm sim thaum lub hauv paus pyrimidine (piv txwv li, thymine [T] lossis cytosine [C]) hloov rau lwm lub hauv paus pyrimidine lossis thaum lub hauv paus purine (piv txwv li, adenine [A] lossis guanine [G]) hloov rau lwm lub hauv paus purine.
Ib yam li ntawd ib tug yuav nug, dab tsi yog peb hom kev hloov pauv?
Muaj peb hom DNA Mutations: kev hloov pauv hauv paus, tshem tawm thiab ntxig
- Kev hloov pauv hauv paus. Ib lub hauv paus hloov pauv yog hu ua point mutations, nco qab qhov kev hloov pauv ntawm Glu --- Val uas ua rau mob mob-hlwb.
- Kev tshem tawm.
- Insertions.
Tsis tas li ntawd, 4 hom kev hloov pauv ntawm cov ntsiab lus yog dab tsi? Nco ntsoov, koj DNA yog tsim los ntawm plaub Base: adenine, thymine, guanine thiab cytosine. Kev hloov pauv hauv kev txiav txim thiab tus lej ntawm cov hauv paus no tuaj yeem ua rau txawv point mutations , suav nrog frameshift, ntsiag to, tsis muaj tseeb thiab missense.
Yog li ntawd, dab tsi yog qhov piv txwv ntawm kev hloov pauv ntawm cov ntsiab lus?
Hom Kev Hloov Pauv
- Hloov pauv. Kev hloov pauv hloov tshwm sim thaum ib khub hauv paus hloov pauv rau lwm tus.
- Insertion thiab Deletion. Ib qho kev hloov pauv hloov tshwm sim thaum ib khub ntxiv hauv paus ntxiv rau ib ntu ntawm cov hauv paus.
- Cystic Fibrosis.
- Sickle-Cell Anemia.
- Tais-Sachs.
Ob hom kev hloov pauv tseem ceeb yog dab tsi?
Kev hloov pauv tuaj yeem ua tau ntau yam hom , xws li hloov pauv, tshem tawm, ntxig, thiab hloov chaw. Kev hloov pauv hauv kev kho cov noob yuav ua rau muaj qhov tshwm sim loj xws li mob qog noj ntshav.
Pom zoo:
Lub ntsiab lus ntawm kev hloov pauv hauv kev txheeb cais yog dab tsi?
Variability hauv Statistics yog dab tsi? Variability (tseem hu ua kis los yog dispersion) yog hais txog kev nthuav tawm cov ntaub ntawv li cas. Variability muab txoj hauv kev los piav qhia ntau npaum li cas cov ntaub ntawv sib txawv thiab tso cai rau koj siv cov txheeb cais los sib piv koj cov ntaub ntawv rau lwm cov ntaub ntawv
Dab tsi yog qhov txawv ntawm ib puag ncig kev hloov pauv thiab kev hloov pauv qub txeeg qub teg?
Qhov sib txawv ntawm cov yam ntxwv ntawm cov tib neeg ntawm tib hom yog hu ua variation. Qhov no yog inherited variation. Qee qhov kev hloov pauv yog qhov tshwm sim ntawm qhov sib txawv ntawm ib puag ncig, lossis ib tus neeg ua dab tsi. Qhov no yog hu ua environmental variation
Dab tsi tsim cov roj siab thiab nws hloov pauv li cas nrog kev hloov pauv hauv kinetic zog?
Gas siab yog tshwm sim los ntawm kev sib tsoo ntawm cov khoom siv roj nrog rau sab hauv ntawm lub thawv thaum lawv sib tsoo nrog thiab tawm dag zog rau ntawm phab ntsa ntim. Tom qab ntawd cov roj yog cua sov. Raws li qhov kub ntawm cov roj nce, cov khoom tau nce lub zog kinetic thiab lawv cov nrawm nrawm
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
Peb qhov laj thawj tseem ceeb ntawm kev hloov pauv hloov pauv yog dab tsi?
Allele frequencies nyob rau hauv ib tug pej xeem yuav hloov vim plaub lub hauv paus zog ntawm evolution: Natural Selection, Genetic Drift, Mutations thiab Gene Flow. Kev hloov pauv yog qhov kawg ntawm cov alleles tshiab hauv cov noob caj noob ces. Ob ntawm cov txheej txheem tseem ceeb tshaj plaws ntawm kev hloov pauv hloov pauv yog: Natural Selection thiab Genetic Drift