Video: Thomas Hunt Morgan paub txog chromosomes li cas?
2024 Tus sau: Miles Stephen | [email protected]. Kawg hloov kho: 2023-12-15 23:36
Los ntawm kev mob siab rau tshuaj xyuas ntau txhiab tus yoov nrog lub tshuab tsom thiab lub iav tsom iav, Morgan thiab nws cov npoj yaig lees paub qhov chromosomal theory of inheritance: that gene yog nyob rau ntawm chromosomes zoo li cov hlaws dai ntawm ib txoj hlua, thiab qee cov noob yog txuas (lub ntsiab lus lawv yog ntawm tib yam chromosome thiab
Yog li ntawd, Thomas Hunt Morgan piav qhia nws qhov kev tshawb pom li cas?
4, 1945, Pasadena, Calif.), American zoologist thiab geneticist, nto moo rau nws kev tshawb fawb nrog cov txiv hmab txiv ntoo yoov (Drosophila) los ntawm qhov uas nws tau tsim cov chromosome txoj kev xav ntawm heredity. Nws tau pom tias cov noob tau txuas rau hauv cov kab ke ntawm chromosomes thiab muaj lub luag haujlwm rau kev txheeb xyuas, keeb kwm ntawm keeb kwm.
Morgan ua pov thawj cov noob nyob rau ntawm chromosomes li cas? Morgan nrhiav tau ib qho kev hloov pauv uas cuam tshuam qhov muag xim. Nws tau pom tias kev hloov pauv tau sib txawv los ntawm txiv neej thiab poj niam yoov. Raws li tus qauv qub txeeg qub teg, Morgan xaus lus tias qhov muag xim noob yuav tsum nyob rau ntawm X chromosome.
Ua raws li qhov no, Thomas Hunt Morgan nrhiav tau dab tsi?
Kab lus. Thomas Hunt Morgan tau txais txiaj ntsig Nobel Prize hauv Physiology lossis Tshuaj hauv xyoo 1933. Cov haujlwm uas tau muab khoom plig tau ua tiav nyob rau hauv 17-xyoo lub sijhawm ntawm Columbia University, pib xyoo 1910 nrog nws nrhiav pom qhov muag dawb ntawm cov txiv hmab txiv ntoo ya, Drosophila.. Morgan tau txais nws Ph.
Leej twg qhia tau tias cov noob tuaj yeem pom ntawm chromosomes?
Morgan
Pom zoo:
Dab tsi yog qhov txawv ntawm chromosomes chromatids thiab homologous chromosomes?
Nws yog ib qho tseem ceeb kom nco ntsoov qhov sib txawv ntawm tus muam chromatids thiab homologous chromosomes. Sister chromatids yog siv nyob rau hauv cell division, zoo li nyob rau hauv lub cell hloov, whereas homologous chromosomes yog siv nyob rau hauv reproductive faib, zoo li ua ib tug neeg tshiab. Sister chromatids yog genetic tib yam
Dab tsi ntawm chromosomes ua cov spindle fibers txuas rau txhawm rau txav cov chromosomes ncig?
Nws thiaj li, cov microtubules txuas los ntawm centrioles ntawm cov ncej ntawm lub xov tooj ntawm tes txuas mus rau txhua lub centromere thiab txhim kho mus rau hauv spindle fibers. Los ntawm kev loj hlob ntawm ib kawg thiab shrinking rau lwm yam, spindle fibers dlhos cov chromosomes raws nruab nrab ntawm lub cell nucleus, kwv yees li equidistant los ntawm spindle ncej
Vim li cas nws tseem ceeb uas peb txoj kev nkag siab txog kev tshawb fawb txog kev sib raug zoo txuas ntxiv mus?
Kev nthuav dav thiab kev loj hlob ntawm kev tshawb fawb txog kev sib raug zoo yog qhov tsim nyog vim nws pab txhawb koj txoj kev sib raug zoo thiab kev sib raug zoo nrog cov neeg hauv zej zog. Thaum koj nyob nrog cov neeg koj yuav tsum nkag siab lawv thiab social science pab koj ua li ntawd
Vim li cas Thomas Hunt Morgan siv cov txiv hmab txiv ntoo yoov rau nws cov kev sim caj ces?
Thomas Hunt Morgan, uas kawm cov txiv hmab txiv ntoo yoov, muab thawj qhov kev pom zoo ntawm chromosome txoj kev xav. Morgan pom qhov kev hloov pauv uas cuam tshuam rau lub qhov muag xim. Nws tau pom tias kev hloov pauv tau sib txawv los ntawm txiv neej thiab poj niam yoov
Peb paub li cas txog lub ntiaj teb sab hauv thiab cov qauv?
Feem ntau ntawm qhov peb paub txog sab hauv ntawm lub ntiaj teb yog los ntawm kev kawm ntawm seismic nthwv dej los ntawm av qeeg. Cov nthwv dej no muaj cov ntaub ntawv tseem ceeb hais txog lub hauv paus ntawm lub ntiaj teb. Raws li seismic nthwv dej hla lub ntiaj teb, lawv yog refracted, los yog khoov, zoo li rays ntawm lub teeb khoov thaum lawv hla txawm lub iav prism