Video: Leej twg yog lub luag haujlwm rau kev tshawb pom DNA?
2024 Tus sau: Miles Stephen | [email protected]. Kawg hloov kho: 2023-12-15 23:36
Lub tswv yim 19 Lub DNA molecule yog zoo li tus ntaiv twisted. James Watson thiab Francis Crick daws cov qauv ntawm DNA. Lwm cov kws tshawb fawb, xws li Rosalind Franklin thiab Maurice Wilkins , kuj tau pab txhawb rau qhov kev tshawb pom no.
Ib yam li ntawd, nws tau nug, leej twg nrhiav tau DNA thiab ua li cas?
Tsim los ntawm Rosalind Franklin siv cov txheej txheem hu ua X-ray crystallography, nws nthuav tawm cov duab helical ntawm DNA molecule. Watson thiab Crick pom tau tias DNA tau tsim los ntawm ob txoj hlua ntawm nucleotide khub uas encode cov ntaub ntawv caj ces rau txhua yam muaj sia.
Tsis tas li ntawd, leej twg yog plaub tus kws tshawb fawb uas tshawb pom DNA? James Watson , Francis Crick , Maurice Wilkins , thiab Rosalind Franklin.
Tib neeg kuj nug, leej twg nrhiav tau DNA?
James Watson
Watson thiab Crick pab tau li cas rau kev tshawb pom DNA?
Watson thiab Francis H. C. Crick tshaj tawm tias lawv tau txiav txim siab tus qauv ob-helix ntawm DNA , cov molecule uas muaj tib neeg cov noob caj noob ces. Txawm li cas los DNA - luv rau deoxyribonucleic acid-yog nrhiav pom Xyoo 1869, nws lub luag haujlwm tseem ceeb hauv kev txiav txim siab caj ces tsis tau tshwm sim txog xyoo 1943.
Pom zoo:
Leej twg tau txais txiaj ntsig los ntawm kev tshawb pom lub hauv paus rau kev tsim noob neej?
Thaum Gregor Mendel pib kawm txog kev xeeb tub hauv xyoo 1843, chromosomes tseem tsis tau pom nyob hauv lub tshuab tsom. Tsuas yog nrog cov koob tshuaj zoo dua thiab cov tswv yim zoo thaum lub sijhawm xyoo 1800s tuaj yeem ua rau cov kws tshawb fawb ntawm tes pib stains thiab saib xyuas cov txheej txheem subcellular, pom lawv tau ua dab tsi thaum lub sijhawm cell faib (mitosis thiab meiosis)
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Leej twg yog tus kws tshuaj caj ces uas yog lub luag haujlwm rau kev siv DNA science rau forensics?
Alec Jeffreys
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Leej twg yog lub luag haujlwm rau txoj kev xav ntawm social evolutionism?
Lub xyoo pua 19th anthropologist Lewis Henry Morgan feem ntau hu ua tus neeg uas xub siv cov ntsiab lus hloov pauv mus rau kev sib raug zoo tshwm sim