Video: Kev tswj tsis tiav txhais tau li cas muab piv txwv?
2024 Tus sau: Miles Stephen | [email protected]. Kawg hloov kho: 2023-12-15 23:36
Tsis tiav dominance txhais tau tias hais tias ib qho allele tsis yog tseem ceeb los yog recessive. Ib piv txwv yuav yog cov alleles rau cov noob uas txiav txim siab xim zoo nkauj ntawm tsob ntoo Mirabilis. Tom qab cov me nyuam loj hlob tuaj, peb yuav tsum xyuas cov txiaj ntsig thiab yog tias qee qhov liab qab, ces cov xim alleles tsis tiav. tseem ceeb.
Yog li ntawd, dab tsi yog qhov piv txwv ntawm kev tswj tsis tiav?
Thaum ib tug niam txiv nrog cov plaub hau ncaj thiab ib tug nrog cov plaub hau curly muaj ib tug me nyuam nrog wavy plaub hau, uas yog ib tug piv txwv ntawm tsis tiav dominance . Qhov muag xim feem ntau raug suav hais tias yog ib qho piv txwv ntawm tsis tiav dominance.
Tsis tas li ntawd, qhov piv txwv ntawm kev tswj hwm tag nrho yog dab tsi? Cov paj ntawm Mendel's pea cog yog ib qho piv txwv ntawm tag nrho dominance , los yog thaum twg tseem ceeb allele tag npog li recessive allele. Ntxiv rau ua tiav dominance , cov kws tshawb fawb pom tias tsis tiav kev tswj hwm , qhov twg muaj kev sib xyaw, thiab kev sib koom ua ke, qhov twg ob leeg alleles tshwm sim.
Hauv qhov no, kev tswj hwm tsis tiav txhais li cas?
Tsis tiav dominance yog ib daim ntawv ntawm cov qub txeeg qub teg nyob rau hauv uas ib tug allele rau ib tug tshwj xeeb zoo yog tsis kiag li qhia tag nrho nws cov khub allele. Qhov no ua rau muaj qhov thib peb phenotype uas qhia lub cev zoo yog kev sib txuas ntawm cov phenotypes ntawm ob qho tag nrho.
Codominance yog dab tsi thiab muab piv txwv?
Thaum ob lub alleles rau ib qho kev zoo sib npaug sib npaug nrog tsis yog recessive los yog dominant, nws tsim codominance . Piv txwv ntawm codominance suav nrog tus neeg muaj ntshav hom AB, uas txhais tau hais tias ob qho tib si A allele thiab B allele tau qhia sib npaug.
Pom zoo:
Vim li cas peb thiaj li hais txog kev txwv tsis pub muaj kev hais tawm thiab thaum twg peb yuav hais cov kev txwv?
Peb hais txog kev txwv vim nws yuav ua rau qhov sib npaug tsis tau txhais hauv qee qhov txiaj ntsig ntawm x. Qhov kev txwv ntau tshaj plaws rau cov lus qhia muaj nuj nqis yog N / 0. Qhov no txhais tau tias txhua tus lej muab faib los ntawm xoom tsis tau txhais. Piv txwv li, rau txoj haujlwm f(x) = 6/x², thaum koj hloov x = 0, nws yuav ua rau 6/0 uas tsis tau txhais
Yog vim li cas combustion tiav yog zoo dua li tsis tiav combustion?
Tsis tiav combustion tshwm sim thaum cov khoom cua lossis oxygen tsis zoo. Dej tseem tsim, tab sis carbon monoxide thiab carbon yog tsim los ntawm carbon dioxide. Cov pa roj carbon yog tso tawm raws li cov kua qaub. Cov pa roj carbon monoxide yog cov pa tshuaj lom, uas yog ib qho laj thawj vim li cas kev sib xyaw ua tiav yog nyiam rau kev ua tsis tiav
Puas yog xim tawv nqaij ua piv txwv ntawm kev ua tsis tiav?
Tsis tiav dominance tshwm sim nyob rau hauv cov khoom qub txeeg qub teg ntawm polygenic xws li qhov muag xim thiab xim ntawm daim tawv nqaij. Incomplete dominance yog ib daim ntawv ntawm cov qub txeeg qub teg hauv nruab nrab uas ib qho allele rau ib qho tshwj xeeb tsis tau qhia tag nrho nws cov khub allele
Yuav ua li cas yog ib tug snapdragon piv txwv ntawm tsis tiav dominance?
Cov paj liab no yog qhov tshwm sim ntawm kev ua tsis tiav. Txawm li cas los xij, kev sib xyaw cov paj liab ua rau ¼ liab, ¼ dawb thiab frac12; liab. Pink snapdragons yog qhov tshwm sim ntawm kev ua tsis tiav. Hla-pollination ntawm liab snapdragons thiab dawb snapdragons ua rau liab dawb thaum tsis yog dawb los yog liab alleles yog dominant
Dab tsi yog kev tswj zoo thiab kev tswj tsis zoo hauv gel electrophoresis?
Kev tswj qhov zoo thiab qhov tsis zoo yog cov qauv uas tau siv los lees paub qhov siv tau ntawm gel electrophoresis sim. Cov kev tswj tau zoo yog cov qauv uas muaj cov cim paub txog DNA lossis cov protein thiab yuav txav mus rau ib txoj hauv kev tshwj xeeb ntawm cov gel. Kev tswj tsis zoo yog cov qauv uas tsis muaj DNA lossis cov protein