Video: Kab rov tav hloov cov noob txhais li cas?
2024 Tus sau: Miles Stephen | [email protected]. Kawg hloov kho: 2023-12-15 23:36
Kab rov tav hloov cov noob (HGT) lub lateral hloov mus rau noob (LGT) yog cov txav ntawm caj ces cov khoom ntawm unicellular thiab/los yog multicellular kab mob uas tsis yog los ntawm (" ntsug") kis ntawm DNA los ntawm niam txiv mus rau cov xeeb ntxwv (loj hlob).
Raws li txoj cai, kab rov tav hloov cov noob tshwm sim li cas?
Kab rov tav hloov cov noob muaj tshwm sim ntawm peb lub ntsiab mechanisms: transformation, transduction los yog conjugation. Kev hloov pauv muaj feem cuam tshuam txog ntu luv ntawm DNA liab qab los ntawm cov kab mob hloov pauv tau. Transduction suav nrog hloov DNA los ntawm ib tug kab mob mus rau lwm yam ntawm bacteriophages.
Ib yam li ntawd, 3 hom kab rov tav hloov cov noob yog dab tsi? 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.
Yog li ntawd, dab tsi yog qhov piv txwv ntawm kab rov tav hloov cov noob?
2.3. Feem ntau ntawm piv txwv ntawm kab rov tav hloov cov noob paub nyob rau hauv prokaryotes. Hauv cov kab mob, peb lub hauv paus ntsiab lus tuaj yeem kho tau kab rov tav hloov pauv : transformation (uptake of free DNA ), conjugation (plasmid-mediated hloov ), thiab transduction (phag-mediated hloov ).
Dab tsi yog qhov txawv ntawm kab rov tav thiab ntsug hloov cov noob?
Kab rov tav hloov cov noob (HGT) txhais tau tias yog hloov ntawm caj ces khoom nruab nrab cov kab mob tsis sib txuas nrog kev faib cell [1–3]. Piv txwv li, ntsug qub txeeg qub teg yog kis ntawm caj ces cov ntaub ntawv los ntawm niam cell mus rau tus ntxhais cell thaum lub sij hawm faib cell.
Pom zoo:
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)
Kab rov tav kab ntawm lub sij hawm hloov pauv yog dab tsi?
Peb paub tias thaj tsam uas khi los ntawm kab thiab cov axes ntawm qhov nrawm-lub sij hawm V-T daim duab yog sib npaug rau qhov kev txav ntawm cov khoom txav thaum lub sijhawm ntawd. Kab rov tav ntawm lub sij hawm axis txhais tau tias tsis muaj kev txav
Vim li cas txoj kab kab rov tav muaj txoj kab nqes ntawm 0?
Mathwords: Zero Slope. Txoj kab nqes ntawm kab rov tav. Kab rov tav kab muaj nqes 0 vim tias tag nrho nws cov ntsiab lus muaj tib y-coordinate. Yog li ntawd, tus qauv siv rau txoj kab nqes ntsuas rau 0
Puas yog kab rov tav txoj kab nqes 0 lossis tsis tau txhais?
Ib yam li 'Z' (nrog nws ob kab kab rov tav) tsis zoo ib yam li 'N' (nrog nws ob txoj kab ntsug), yog li 'Xoom' txoj kab nqes (rau kab kab rov tav) tsis zoo ib yam li 'Tsis yog' txoj kab nqes (rau kab ntsug). Tus naj npawb 'zero' tshwm sim, yog li kab rov tav muaj tseeb muaj txoj kab nqes
Dab tsi yog qhov txawv ntawm kab rov tav thiab ntsug hloov cov noob?
Kab rov tav hloov pauv cov noob (HGT) txhais tau tias yog kev hloov pauv ntawm cov khoom siv caj ces ntawm cov kab mob hauv cov kab mob uas tsis muaj kev sib faib ntawm tes [1–3]. Nyob rau hauv sib piv, ntsug qub qub txeeg qub tes yog kis tau tus kab mob ntawm niam cell mus rau tus ntxhais cell thaum lub sij hawm cell division