Kev tshawb nrhiav DNA pib thaum twg?
Kev tshawb nrhiav DNA pib thaum twg?

Video: Kev tshawb nrhiav DNA pib thaum twg?

Video: Kev tshawb nrhiav DNA pib thaum twg?
Video: Tso Kev Txhaum Tseg - nkauj ntseeg tawm tshiab (Meej Vwj) (Original MV by ChichiaThao) 2023-2024 2024, Kaum ib hlis
Anonim

Hauv kev muaj tiag, DNA tau tshawb pom ntau xyoo ua ntej. Nws yog los ntawm kev ua raws li kev ua haujlwm ntawm cov neeg tho kev ua ntej lawv tias James thiab Francis tuaj yeem tuaj rau lawv qhov kev txiav txim siab hauv av txog cov qauv ntawm DNA nyob rau hauv 1953. Zaj dab neeg ntawm lub discovery ntawm DNA pib hauv 1800s…

Kuj nug, thaum twg DNA tau pom thawj zaug?

Ntau tus neeg ntseeg tias American biologist James Watson thiab English physicist Francis Crick nrhiav pom DNA hauv xyoo 1950s. Qhov tseeb, qhov no tsis yog li ntawd. Es, DNA yog ua ntej pom nyob rau hauv lig 1860s los ntawm Swiss chemist Friedrich Miescher.

Tsis tas li ntawd, thaum twg tau tshawb nrhiav caj ces? Tag nrho tam sim no kev tshawb fawb hauv noob caj noob ces tuaj yeem taug qab mus rau Mendel qhov kev tshawb pom ntawm cov kev cai tswj hwm qhov qub txeeg qub teg ntawm qhov zoo. Lo lus noob caj noob ces qhia hauv 1905 los ntawm Askiv biologist William Bateson, leej twg yog ib qho ntawm cov neeg nrhiav pom ntawm Mendel txoj haujlwm thiab uas tau los ua tus yeej ntawm Mendel cov ntsiab lus ntawm kev qub txeeg qub teg.

Hais txog qhov no, qhov twg DNA tau pom thawj zaug?

Nws cov qauv molecular yog ua ntej tau txheeb xyuas los ntawm Francis Crick thiab James Watson ntawm Cavendish Laboratory hauv University of Cambridge hauv 1953, uas nws cov qauv tsim kev siv zog tau coj los ntawm X-ray diffraction cov ntaub ntawv tau txais los ntawm Raymond Gosling, uas yog ib tug tub ntxhais kawm tiav ntawm Rosalind Franklin ntawm King's College.

Leej twg tsim DNA?

James Watson thiab Francis Crick qhia thawj qhov tseeb ob-helix qauv ntawm DNA qauv. Kev sim Meselson-Stahl tau lees paub cov txheej txheem rov ua dua raws li tau hais los ntawm cov qauv ob-helical. Watson, Crick , thiab Wilkins koom ua ke tau txais Nobel nqi zog hauv Physiology lossis Tshuaj.

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