Kev hloov pauv caj ces tuaj yeem tshwm sim los ntawm mutation (uas tuaj yeem tsim cov alleles tshiab hauv cov pejxeem), random mating, random fertilization, thiab recombination ntawm homologous chromosomes thaum lub sij hawm meiosis (uas reshuffles alleles nyob rau hauv lub cev xeeb tub).
Yuav ua li cas 3 qhov kev hloov pauv?
Rau cov neeg muab, muaj peb qhov kev hloov pauv: mutation, recombination, thiab kev nkag tebchaws ntawm cov noob.
Kev hloov caj ces yog dab tsi thiab nws tshwm sim los ntawm qhov twg?
Kev hloov pauv, kev hloov pauv hauv cov kab ke ntawm cov noob hauv DNA, yog ib qho ntawm kev hloov pauv caj ces. Lwm qhov chaw yog gene flow, los yog kev txav ntawm cov noob ntawm ntau pawg ntawm cov kab mob. Thaum kawg, kev hloov pauv ntawm caj ces tuaj yeem tshwm sim los ntawm kev sib deev, uas ua rau muaj kev tsim cov kev sib txuas tshiab ntawm cov noob.
Puas genetic variation zoo los phem?
Kev hloov pauv caj ces yog zoo rau cov pej xeemvim nws ua rau qee tus neeg hloov mus rau ib puag ncig thaum tswj kev ciaj sia ntawm cov pejxeem.
Kev hloov caj ces hauv ib tus neeg tshwm sim li cas?
Kev hloov pauv caj ces tuaj yeem tshwm sim los ntawm cov noob sib txawv (tseem hu ua kev hloov pauv) lossis los ntawm cov txheej txheem ib txwm muaj uas cov khoom siv caj ces raug rov kho dua li lub xovtooj tau npaj los faib (paub tias yog caj ces. recombination). Genetic variations uas hloov cov kev ua ntawm noob caj noob ces los yog protein muaj nuj nqi tuaj yeem qhia cov yam ntxwv sib txawv hauv ib qhokab mob.
