Ntau txoj hauv kev, koj yog koj cov proteins - koj lub cev thiab biochemical cov yam ntxwv tau qhia thiab tswj los ntawm cov proteins, uas yog coded los ntawm koj DNA. Cov noob uas tau hais tawm yog lub luag haujlwm rau koj qhov zoo, lossis phenotype. Lub phenotype tseem ceeb yog qhov zoo uas tshwm sim los ntawm cov noob tseem ceeb.
Tus piv txwv tseem ceeb phenotype yog dab tsi?
Muaj ntau tus yam ntxwv ntawm tib neeg phenotype, uas yog tswj los ntawm cov tseem ceeb alleles: Cov plaub hau tsaus yog tseem ceeb tshaj cov plaub hau daj lossis cov plaub hau liab. Cov plaub hau curly yog dominant tshaj cov plaub hau ncaj. Baldness yog qhov tseem ceeb tshaj plaws. Muaj tus poj ntsuam lub ncov (v-puab plaub hau) yog qhov tseem ceeb tshaj qhov muaj plaub hau ncaj.
Koj paub li cas phenotype yog dominant?
txhawm rau txheeb xyuas seb cov kab mob twg uas pom qhov tseem ceeb yog homozygous lossis heterozygous rau ib qho allele, tus kws tshawb fawb tuaj yeem ua ib xeem hla. Cov kab mob nyob rau hauv nqe lus nug yog hla nrog ib tug kab mob uas yog homozygous rau lub recessive zoo, thiab cov xeeb leej xeeb ntxwv ntawm tus ntoo khaub lig xeem yog soj ntsuam.
Tus phenotype twg yog qhov tseem ceeb thiab rov ua dua?
Ib tug tus neeg uas muaj ib qho tseem ceeb thiab ib qho kev rov qab ua rau cov noob yuav muaj cov phenotype tseem ceeb. Lawv feem ntau suav hais tias yog "cov neeg nqa khoom" ntawm cov allele recessive: lub recessive allele nyob ntawd, tab sis qhov recessive phenotype tsis yog.
Yuav ua li cas genotype yog dominant?
Ib qho tseem ceeb allele yog txhais los ntawm tsab ntawv loj (A piv rau a). Txij li thaum txhua tus niam txiv muab ib qho allele, qhov ua tau ua ke yog: AA, Aa, thiab aa. Cov xeeb leej xeeb ntxwv uas nws genotype yog AA lossis Aa yuav muaj qhov tseem ceeb tshaj plaws uas tau hais tawm phenotypically, thaum cov neeg aa qhia txog qhov tsis zoo.
