Qhov Tseem Ceeb Qhov Sib Txawv - Ntxiv vs Tsis Ntxiv Cov Gene Action
Kev sib cuam tshuam ntawm cov alleles ntawm cov noob caj noob ces tuaj yeem ua rau muaj qhov sib txawv ntawm cov noob caj noob ces lossis cov phenotypes. Cov txheej txheem genetic quantitative tso cai rau cov kev ua gene los ntsuas hauv cov neeg xaiv sib txawv. Yog li, noob caj noob ces tuaj yeem muab faib ua peb hom tseem ceeb xws li Additive Gene Action, Dominance Gene action lossis Non Additive gene action thiab Epistasis. Additive Gene Action yog hu ua qhov tshwm sim nyob rau hauv uas ob alleles pab sib npaug rau kev tsim cov phenotype. Tsis yog additive lossis dominance gene action yog hais txog qhov tshwm sim uas ib qho allele tau qhia muaj zog dua li lwm cov allele. Qhov sib txawv tseem ceeb ntawm cov additive thiab cov noob tsis yog additive yog raws li nws cov lus qhia allelic. Hauv kev ua cov noob caj noob ces, ob qho alleles tau qhia thaum nyob rau hauv cov noob caj noob ces tsis muaj ntxiv ib qho allele tau qhia muaj zog dua li lwm cov allele.
Dab tsi yog Additive Gene Action?
Additive gene action yog hais txog qhov tshwm sim uas ob qho tib si alleles hauv cov noob tau qhia sib npaug thiab tsis qhia kev tswj hwm ib leeg. Txhua tus allele muaj lub sijhawm sib npaug los qhia kom muaj qhov phenotype. Qhov tshwm sim phenotype yog kev sib xyaw ntawm ob homozygous (homozygous dominant thiab homozygous recessive) hom. Yog li ntawd, cov noob caj noob ces ntxiv yog qhia nyob rau hauv cov xwm txheej heterozygous.
Cov noob caj ces kuj tau hais tias yog qhov ntxiv yog tias lawv qhia cov yam ntxwv hauv qab no;
- Thaum hloov pauv ntawm ib qho allele rau lwm qhov ua rau tib yam ntxiv lossis rho tawm tsis hais lwm cov noob (s).
- Thaum cov nyhuv tib yam hloov pauv tshwm sim hauv homozygote lossis heterozygote mob.
Cov piv txwv hauv qab no qhia txog cov qauv kev ua haujlwm gene ntxiv;
Daim duab 01: Additive Gene Action Model
Nyob hauv tus qauv no, ib qho allelic ua ke yuav muab tib lub ntsiab lus yog hloov nrog ib leeg. Raws li qhov no, Tt=[TT + tt] / 2=8. Qhov no qhia tau hais tias tsis muaj dominance qhia los ntawm ob qho tag nrho. Nws zoo ib yam li R noob ib yam nkaus.
Dab tsi yog Qhov Tsis Muaj Tshuaj Ntxiv Gene Action?
Tsis yog tshuaj ntxiv noob caj ces kuj raug hu ua Dominance gene action raws li nws cuam tshuam nrog tus yam ntxwv ntawm kev tswj hwm. Nyob rau hauv non-additive gene action, ib allele ntawm cov noob yog qhia muaj zog tshaj li lwm yam allele. Yog li, yog tias cov genotype hloov pauv qhov kev txiav txim lossis cov phenotype ntawm cov noob yuav txawv. Yog li ntawd, tus qauv genetic quantitative no kuj yog hu ua dominance gene action.
Qhov kev tswj hwm tuaj yeem raug cais ntxiv raws li kev ua tiav thiab tsis tiav nyob ntawm txoj kev tau txais. Yog hais tias nws yog ib qho mob heterozygous, nws tuaj yeem ua rau tsis tiav dominance whereas nyob rau hauv homozygous mob nws ua rau tag nrho dominance.
Non additive gene action model is illustrated in the following example.
Daim duab 02: Tsis yog Additive Gene Action Model
Cov qauv no qhia tau hais tias kev sib xyaw ua ke TT yog sib npaug rau RR thiab tib yam nrog cov xwm txheej heterozygous uas yog tt thiab rr raws. Yog li ntawd, muaj kev tswj hwm tiav, thiab tsis muaj kev cuam tshuam ntawm T thiab R noob.
Yog li ntawd, hauv cov tshuaj tsis muaj tshuaj ntxiv, ib qho allele npog qhov kev qhia ntawm allele. Qhov no kuj tau qhia nyob rau hauv Mendelian noob caj noob ces qhov heterozygote tau pom daim ntawv tseem ceeb thaum nws phenotypic qhia thaum niam txiv homozygous hla ib leeg.
Dab tsi zoo sib xws ntawm Additive thiab Non Additive Gene Action?
- Ob hom ua rau muaj qhov ntsuas ntawm cov noob caj ces.
- Ob leeg koom nrog hauv kev kwv yees cov lus qhia allelic raws li homozygous lossis heterozygous.
Qhov txawv ntawm Additive thiab Non Additive Gene Action yog dab tsi?
Additive vs Non Additive Gene |
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| Additive Gene Action yog hu ua qhov tshwm sim uas ob lub alleles ntawm cov noob koom ua ke sib npaug rau kev tsim cov phenotype. | Tsis yog additive lossis dominance noob ua yog hais txog qhov tshwm sim uas ib qho allele tau qhia muaj zog dua li lwm cov allele. |
| Tsis pom muaj kev tswj hwm, ob leeg alleles qhia sib npaug hauv cov noob caj noob ces ntxiv. | Tej zaum ua kom tiav kev tswj hwm lossis tsis tiav kev tswj hwm hauv cov noob caj noob ces. |
Summary – Additive vs Non Additive Gene Action
Ntxiv thiab tsis ntxiv cov noob caj noob ces muaj nyob rau hauv qeb ntawm ntau cov noob caj noob ces uas cov lus qhia allelic raug tshuaj xyuas. Nyob rau hauv cov noob caj noob ces ntxiv, txhua tus allele ntawm cov noob muaj qhov sib npaug ntawm nws qhov kev qhia, qhov uas tsis yog-cov noob caj noob ces ntxiv, ib qho allele tau nthuav tawm muaj zog dua piv nrog rau lwm qhov ua rau muaj kev tswj hwm. Cov kab lus allelic yog ntsuas, thiab cov zaus tau txais los ua tus cwj pwm ntawm cov noob caj noob ces ntawm ib tus neeg lossis cov nroj tsuag. Cov ntaub ntawv no feem ntau yog siv rau hauv cov txheej txheem cog qoob loo los xaiv cov noob qoob loo uas muaj zog tshaj plaws ntawm cov qoob loo. Qhov no yog qhov txawv ntawm additive thiab non additive gene action.
Download the PDF of Additive vs Non Additive Gene Action
Koj tuaj yeem rub tawm PDF version ntawm kab lus no thiab siv nws rau offline hom phiaj raws li daim ntawv ceeb toom. Thov rub tawm PDF version ntawm no: Qhov txawv ntawm Ntxiv thiab Tsis yog - Additive Gene Action
