Yuav ua li cas genetic map nrug xam?
Yuav ua li cas genetic map nrug xam?

Video: Yuav ua li cas genetic map nrug xam?

Video: Yuav ua li cas genetic map nrug xam?
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Anonim

Qhov zaus ntawm kev hla dhau (% recombination) ntawm ob loci yog ncaj qha ntsig txog lub cev nyob deb nruab nrab ntawm ob loci. Qhov feem pua recombination nyob rau hauv ib qho kev xeem hla sib npaug daim ntawv qhia nyob deb (1 daim ntawv qhia unit = 1% recombination).

Ua raws li qhov no hauv kev xav, koj ua li cas xam cov noob rau centromere nyob deb daim ntawv qhia?

Rau xam tus nyob deb ntawm qhov chaw los ntawm nws chaw nyob hauv daim ntawv qhia units , tsuas yog ntsuas qhov feem pua ntawm tetrads uas qhia cov qauv kev sib cais thib ob rau qhov chaw ntawd thiab faib los ntawm ob. Thaum xav txog ob noob , muaj qhov tshwm sim hauv qab no. Cov loci yog nyob ntawm nyias chromosomes.

Tom qab, lo lus nug yog, dab tsi yog daim duab qhia chaw? Nyob rau hauv cov noob caj noob ces, ib tug centimorgan (abbreviated cM) los yog daim ntawv qhia unit (m.u.) yog a chav tsev rau ntsuas kev sib txuas ntawm caj ces. Nws txhais tau hais tias qhov kev ncua deb ntawm chromosome txoj haujlwm (tseem hu ua loci lossis cov cim) uas qhov xav tau nruab nrab ntawm kev cuam tshuam chromosomal crossovers hauv ib tiam yog 0.01.

Yog li ntawd, koj yuav ua li cas xam recombination nrug?

Cov kev sib txuas nrug yog xam los ntawm kev faib tag nrho cov recombinant gametes rau tag nrho cov gametes.

Dab tsi yog gene mus rau centromer nrug?

Yog li, peb tuaj yeem suav cov nyob deb ntawm a noob los ntawm nws chaw nyob tsuas yog faib cov feem pua ntawm qhov thib ob faib octads los ntawm 2. Gene - centromer nyob deb = ([# ntawm kev faib thib ob octads / tag nrho octads] x 100) / 2. Txhawm rau tshuaj xyuas qhov sib txuas ntawm ob noob Hauv Neurospora, peb tuaj yeem siv tib cov qauv raws li peb tau ua rau Baker's poov xab

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