Dab tsi yog genetic recombination hauv biology?
Dab tsi yog genetic recombination hauv biology?

Video: Dab tsi yog genetic recombination hauv biology?

Video: Dab tsi yog genetic recombination hauv biology?
Video: Saum neej tsis yeej hauv dab tsis tseg.9/10/2018 2024, Kaum ib hlis
Anonim

Genetic recombination (tseem hu ua caj ces reshuffling) yog pauv ntawm caj ces cov khoom sib txawv ntawm cov kab mob sib txawv uas ua rau kev tsim cov xeeb ntxwv nrog kev sib txuas ntawm cov yam ntxwv sib txawv ntawm cov uas pom hauv niam txiv.

Xav txog qhov no, dab tsi yog recombination hauv biology?

Recombination nyob rau hauv meiosis . Recombination yog ib txoj kev uas cov khoom ntawm DNA tau tawg thiab recombined los tsim tshiab ua ke ntawm alleles. Qhov no recombination txheej txheem tsim muaj ntau haiv neeg nyob rau theem ntawm cov noob uas qhia txog qhov sib txawv ntawm DNA sib txawv ntawm cov kab mob sib txawv.

Tsis tas li ntawd, dab tsi yog qhov txheej txheem ntawm genetic recombination? Genetic recombination yog complex txheej txheem uas cuam tshuam nrog kev sib raug zoo ntawm ob homologous DNA strands, meej tawg ntawm txhua txoj hlua, sib npaug ntawm DNA ntu ntawm ob txoj hlua, thiab kev sib khi ntawm cov txiaj ntsig tau rov ua dua DNA molecules los ntawm kev ua ntawm enzymes hu ua ligases.

Ib tug kuj yuav nug, dab tsi yog qhov piv txwv ntawm genetic recombination?

General los yog homologous recombination tshwm sim ntawm DNA molecules ntawm ib ntu zoo sib xws, xws li homologous chromosomes hauv cov kab mob diploid. Zoo piv txwv yog cov kab ke rau kev koom ua ke ntawm qee cov kab mob bacteriophage, xws li l, rau hauv cov kab mob chromosome thiab kev hloov kho ntawm immunoglobulin. noob nyob rau hauv cov tsiaj vertebrate.

Dab tsi yog 3 txoj hauv kev ntawm kev sib txuas caj ces?

Txawm li cas los xij, cov kab mob tau pom txoj kev nce lawv caj ces kev sib txawv ntawm peb cov txheej txheem recombination : Transduction, transformation thiab conjugation.

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