Video: Dab tsi yog variation nyob rau hauv reproduction?
2024 Tus sau: Miles Stephen | [email protected]. Kawg hloov kho: 2023-12-15 23:36
Kev hloov pauv hais txog qhov sib txawv ntawm cov tswv cuab ntawm tib hom. Feem ntau muaj cov caj ces dav dav kev hloov pauv nyob rau hauv ib tug pej xeem ntawm cov kab mob los yog ib hom. Qhov zoo ntawm kev sib deev kev yug me nyuam : nws ua kev hloov pauv hauv cov xeeb ntxwv.
Ua raws li qhov no hauv kev xav, dab tsi yog qhov tseem ceeb ntawm kev hloov pauv hauv kev yug me nyuam?
Kev hloov pauv tso cai rau qee tus neeg nyob hauv cov pej xeem hloov mus rau qhov chaw hloov pauv. Qee cov alleles tshiab ua rau lub cev muaj peev xwm muaj sia nyob thiab yug me nyuam , uas tom qab ntawd ua kom muaj sia nyob ntawm allele hauv cov pejxeem.
Tsis tas li ntawd, 2 hom kev hloov pauv yog dab tsi? Hom Variation Variation nyob rau hauv ib hom yog tsis tshua muaj, tab sis yeej muaj ob yam loj ntawm kev hloov pauv nyob rau hauv ib hom: nruam kev hloov pauv thiab tsis tu ncua kev hloov pauv . Tsis tu ncua kev hloov pauv yog qhov txawv hom kev hloov pauv muab faib rau ntawm qhov txuas ntxiv.
Ib tug kuj yuav nug, dab tsi yog qhov chaw ntawm kev hloov pauv ntawm asexual reproduction?
Recombination. Cov kab mob feem ntau yug me nyuam asexually . Cells loj, luam lawv DNA, thiab faib ua ob lub hlwb tshiab. Lub xwb qhov chaw ntawm variation , yog li ntawd, yog kev hloov pauv, thiab txhua qhov kev hloov pauv yuav tsum sib sau nrog lwm cov kev hloov pauv, ib qho tom qab, ua ntej kev sib txuas tshiab ntawm cov noob tuaj yeem ua tau.
Dab tsi yog qhov kev hloov pauv hauv biology?
Variation, nyob rau hauv biology , txhua qhov sib txawv ntawm cov hlwb, cov kab mob ntawm tus kheej, lossis cov kab mob ntawm ib hom kab mob tshwm sim los ntawm kev sib txawv ntawm caj ces (genotypic kev hloov pauv ) lossis los ntawm kev cuam tshuam ntawm ib puag ncig yam ntawm qhov kev qhia ntawm cov caj ces muaj peev xwm (phenotypic kev hloov pauv ).
Pom zoo:
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