Kev hloov pauv caj ces hauv ib hom tuaj yeem tshwm sim los ntawm ob peb qhov chaw sib txawv. Kev hloov pauv, kev hloov pauv hauv cov kab ke ntawm cov noob hauv DNA, yog ib qho ntawm kev hloov pauv caj ces. … Thaum kawg, kev hloov pauv caj ces tuaj yeem yog qhov tshwm sim ntawm kev sib deev, uas ua rau kev tsim cov caj ces tshiab.
Variation tshwm sim li cas?
Kev hloov pauv caj ces tuaj yeem tshwm sim los ntawm mutation (uas tuaj yeem tsim cov alleles tshiab hauv cov pej xeem), random mating, random fertilization, thiab recombination ntawm homologous chromosomes thaum lub sij hawm meiosis (uas reshuffles alleles nyob rau hauv lub cev xeeb tub).
3 hom kev hloov pauv yog dab tsi?
Rau cov neeg muab, muaj peb qhov kev hloov pauv: mutation, recombination, thiab kev nkag tebchaws ntawm cov noob.
piv txwv hloov pauv yog dab tsi?
Piv txwv li, dev muaj tails thiab tib neeg tsis ua. … Piv txwv li, tib neeg muaj qhov muag xim txawv, thiab cov dev muaj qhov ntev sib txawv. Qhov no txhais tau hais tias tsis muaj ob tug tswv cuab ntawm ib hom zoo ib yam. Qhov sib txawv ntawm cov tib neeg hauv ib hom yog hu ua variation.
Kev hloov pauv li cas hauv kab mob?
Variation, hauv biology, txhua qhov sib txawv ntawm cov hlwb, cov kab mob ntawm tus kheej, lossis pab pawg ntawm cov kab mob ntawm ib hom kab mob tshwm sim los ntawm genetic sib txawv (genotypic variation) lossis los ntawm kev cuam tshuam ntawm ib puag ncig yam tseem ceeb ntawm kev qhia txog kev muaj peev xwm ntawm caj ces (phenotypic variation).
