Video: Kev tshawb nrhiav DNA pib thaum twg?
2024 Tus sau: Miles Stephen | [email protected]. Kawg hloov kho: 2023-12-15 23:36
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.
Pom zoo:
Yuav siv trigonometry li cas hauv kev tshawb nrhiav kev ua txhaum cai?
Cov kws tshawb fawb forensic thiab cov kws tshawb nrhiav kev ua txhaum cai siv cov kev sib npaug trigonometric thiab cov haujlwm los txiav txim seb qhov twg yuav tshwm sim ntawm qhov xwm txheej tshwj xeeb, tshuaj xyuas cov ntshav splatter, thiab nrog rau kev tshuaj xyuas cov mos txwv qhov los txiav txim lub kaum sab xis ntawm qhov cuam tshuam, thiab siv thev naus laus zis ntawm navigation los pin point tus neeg ua txhaum cai. qhov chaw
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1869 Ib yam li ntawd, dab tsi yog keeb kwm qab qhov xwm thiab kev sib cav sib ceg? Cov nature versus nurtur debate yog ib qho teeb meem qub tshaj plaws hauv kev puas siab puas ntsws. Cov kev sib cav lub hauv paus ntawm cov txheeb ze kev koom tes ntawm noob caj noob ces thiab ib puag ncig yam tseem ceeb rau tib neeg txoj kev loj hlob.
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Qhov kev sib cav tsis sib haum xeeb no tau muaj txij li xyoo 1869, thaum lo lus 'Nature Versus Nurture' tau tsim los ntawm Askiv polymath, Francis Galton. Cov neeg uas pom zoo nrog cov xwm txheej sib cav hais tias DNA thiab genotype uas peb yug los txiav txim siab peb yog leej twg thiab tus cwj pwm dab tsi thiab peb yuav muaj
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Thaum twg Rosalind Franklin pab txhawb rau kev tshawb pom DNA?
Franklin paub zoo tshaj plaws rau nws txoj haujlwm ntawm X-ray diffraction dluab ntawm DNA, tshwj xeeb tshaj yog Diam duab 51, thaum nyob rau ntawm King's College London, uas coj mus rau qhov kev tshawb pom ntawm DNA ob helix rau James Watson, Francis Crick thiab Maurice Wilkins tau koom lub Nobel. Nqi zog hauv Physiology lossis Tshuaj hauv xyoo 1962