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Yuav ua li cas tshwm sim thaum duplication chromosomal mutation?
Yuav ua li cas tshwm sim thaum duplication chromosomal mutation?

Video: Yuav ua li cas tshwm sim thaum duplication chromosomal mutation?

Video: Yuav ua li cas tshwm sim thaum duplication chromosomal mutation?
Video: Cov ntseeg Yexus yuav ua li cas thiaj tsi raug dab sim siab. 2024, Kaum ib hlis
Anonim

Duplication yog hom kev hloov pauv uas suav nrog kev tsim ib lossis ntau daim ntawv luam ntawm cov noob lossis thaj tsam ntawm a chromosome . Gene thiab chromosome duplications tshwm sim nyob rau hauv tag nrho cov kab mob, txawm hais tias lawv yog tshwj xeeb tshaj yog tseem ceeb ntawm cov nroj tsuag. Gene luam tawm yog ib qho tseem ceeb mechanism uas evolution tshwm sim.

Yog li ntawd, dab tsi yog duplication nyob rau hauv chromosomal mutation?

Kev kho mob txhais ntawm Chromosome duplication Chromosome duplication : Ib feem ntawm a chromosome hauv duplicate. Ib yam ntawm kev hloov pauv koom nrog kev tsim ib lossis ntau daim ntawv luam ntawm ib qho ntawm DNA, suav nrog qee zaum cov noob lossis txawm tias tag nrho chromosome . A luam tawm yog qhov opposite ntawm ib tug deletion.

Ib yam li ntawd, chromosomal mutation tshwm sim li cas? Kev hloov pauv ua tau tshwm sim ua ntej, thaum, thiab tom qab mitosis thiab meiosis. Kev hloov pauv kuj tshwm sim los ntawm kev hloov pauv noob thiab lwm yam kev hloov pauv loj hauv DNA ntu ntawm a chromosome . Kev hloov pauv yog txav ntawm ib ntu ntawm DNA ntawm ib qho chaw mus rau lwm qhov hauv ib qho chromosome los yog nruab nrab chromosomes.

Kuj paub, qhov piv txwv ntawm kev hloov pauv hloov pauv yog dab tsi?

Lub sij hawm " luam tawm " tsuas yog txhais tau tias yog ib feem ntawm chromosome luam tawm , los yog tam sim no nyob rau hauv 2 daim ntawv luam. Ib piv txwv ntawm qhov tsis tshua muaj kab mob caj ces ntawm luam tawm hu ua Pallister Killian syndrome, uas yog ib feem ntawm #12 chromosome luam tawm.

Dab tsi yog 4 hom kev hloov pauv?

Muaj peb hom DNA Mutations: lub hauv paus hloov, tshem tawm thiab ntxig

  • Kev hloov pauv hauv paus. Ib qho kev hloov pauv yog hu ua point mutations, nco qab qhov kev hloov pauv ntawm Glu --- Val uas ua rau mob qog nqaij hlav.
  • Kev tshem tawm.
  • Insertions.

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