Video: Cov txheej txheem ntawm kev hloov cov noob yog dab tsi?
2024 Tus sau: Miles Stephen | [email protected]. Kawg hloov kho: 2023-12-15 23:36
Transduction, ua txheej txheem nyob rau hauv uas cov kab mob DNA yog txav los ntawm ib tug kab mob mus rau lwm tus los ntawm ib tug kab mob (ib tug bacteriophage, los yog phage). Bacterial conjugation, ib txheej txheem uas koom nrog hloov ntawm DNA ntawm lub plasmid los ntawm ib tug pub cell mus rau ib tug recombinant tau txais cell thaum lub sij hawm cell-to-cell sib cuag.
Tib neeg kuj nug, yuav ua li cas hloov cov gene ua tiav?
Hauv kev hloov pauv, DNA kis tau los ntawm ib lub xovtooj mus rau lwm qhov ntawm cov kab mob bacteriophage. Hauv kab rov tav noob hloov , DNA tau txais tshiab tau muab tso rau hauv lub genome ntawm tus neeg tau txais kev pab los ntawm kev sib koom ua ke lossis kev ntxig. Insertion tshwm sim thaum cov DNA txawv teb chaws nkag mus rau hauv ib lub xovtooj sib koom tsis muaj homology nrog DNA uas twb muaj lawm.
Tom qab ntawd, lo lus nug yog, dab tsi yog hloov gene siv rau? Ntxiv rau, noob hloov mus rau hauv kab lis kev cai los ntawm kev ncaj qha DNA uptake yog siv rau kev lag luam tsim cov genetic engineered proteins. Cov tshuaj, cov tshuaj hormones, khoom noj khoom haus additives, thiab lwm yam khoom muaj txiaj ntsig tuaj yeem tsim los ntawm cov hlwb uas tsim nyog noob ua tau pauv.
Tom qab ntawd, dab tsi yog txhais los ntawm kev hloov cov noob?
Kho mob Txhais ntawm Gene hloov Gene hloov : Kev nkag mus ntawm qhov tsis sib xws caj ces cov ntaub ntawv nyob rau hauv daim ntawv ntawm DNA rau hauv hlwb. Muaj ntau qhov laj thawj ua noob hloov . Tej zaum qhov tseem ceeb ntawm cov laj thawj no yog kev kho cov kab mob siv noob hloov muab cov neeg mob kho noob.
Dab tsi yog 3 hom kab rov tav hloov cov noob?
Muaj peb mechanisms ntawm kab rov tav hloov pauv nyob rau hauv cov kab mob: transformation, transduction, thiab conjugation. Qhov feem ntau mechanism rau kab rov tav gene Kev sib kis ntawm cov kab mob, tshwj xeeb tshaj yog los ntawm cov kab mob pub dawb mus rau ntau hom neeg tau txais, yog kev sib txuas.
Pom zoo:
Cov txheej txheem ntawm kev tsim cov kev daws teeb meem yog dab tsi?
Kev daws yog tsim thaum ib yam khoom hu ua thesolute 'dissolves' rau hauv lwm yam khoom hu ua hnyav.Dissolving yog thaum lub solute tawg los ntawm ib tug loj siv lead ua ntawm molecules mus rau ntau me me los yog ib tug molecules. Lawv ua qhov no los ntawm rub tawm cov ions thiab tom qab ntawd ncig cov ntsev molecules
Dab tsi yog qhov tseem ceeb ntawm cov noob caj noob ces rau kev loj hlob ntawm fetal?
Kev soj ntsuam ntawm lub luag haujlwm ntawm chromosomes hauv tib neeg txoj kev loj hlob thiab kev loj hlob ntawm lub fetus tau mob siab rau qhov txawv txav ntawm chromosomal. Cov noob muaj cov lus qhia rau kev loj hlob thiab kev loj hlob. Qee qhov kev hloov gene ua rau cov gene faulty kom cov lus nyeem tsis raug lossis tsis nyeem tag nrho los ntawm lub xovtooj ntawm tes
Dab tsi yog txhais los ntawm cov noob tseem ceeb thiab cov noob caj noob ces?
(Nyob rau hauv cov ntsiab lus ntawm caj ces, ib qho tseem ceeb tshaj plaws yog ib qho uas yog phenotypically qhia hauv heterozygotes). Ib qho tseem ceeb tshaj plaws yog tawm tsam qhov tsis zoo uas tshwm sim tsuas yog thaum muaj ob daim ntawv theej ntawm cov noob. (Nyob rau hauv cov ntsiab lus genetic, ib tug recessive zoo yog ib tug uas yog phenotypically qhia tsuas yog nyob rau hauv homozygotes)
Dab tsi yog qhov ua rau muaj kev hloov pauv hauv kev tswj cov txheej txheem txheeb cais?
'Ib qho laj thawj' kev hloov pauv yog qhov kev hloov pauv uas xav tias yuav muaj nyob rau hauv cov txheej txheem ruaj khov thiab feem ntau yog vim qhov yuam kev xws li kev kaw lossis ntsuas qhov yuam kev. Cov peev txheej ntawm qhov yuam kev no yuav tshwm sim tsis hais txog lwm yam, thiab yuav ua rau muaj qhov sib txawv me ntsis ntawm kev ntsuas
Dab tsi yog txheej txheem spontaneous thiab non-spontaneous txheej txheem?
Cov txheej txheem spontaneous yog ib qho uas tshwm sim yam tsis muaj kev cuam tshuam ntawm sab nraud. Ib txoj kev uas tsis yog tshwm sim yuav tsis tshwm sim yog tias tsis muaj kev cuam tshuam ntawm sab nraud