Qhov sib txawv tseem ceeb ntawm homozygous thiab hemizygous yog homozygous yog qhov mob uas ob qho tib si ntawm cov kab mob diploid yog tib yam thaum hemizygous yog qhov mob uas tsuas yog ib qho allele tam sim no.
Genes muaj xws li alleles lossis luam. Feem ntau, ib lub noob muaj ob lub alleles. Ib qho allele yog ib qho qauv ntawm cov noob uas ua rau muaj qhov txawv txav phenotypic. Alleles tuaj yeem ua tau zoo lossis rov ua dua. Dominant alleles qhia tag nrho hauv phenotype thaum recessive alleles tsis qhia cov phenotype thaum lawv nrog dominant alleles. Homozygous, heterozygous, hemizygous thiab nullizygous yog txawv zygosity qib. Homozygous yog lub xeev uas muaj cov alleles zoo sib xws, ob qho tseem ceeb alleles los yog ob lub recessive alleles. Hemizygous yog lub xeev uas tsuas muaj ib daim ntawv luam lossis allele ntawm cov noob.
Homozygous yog dab tsi?
Homozygous txhais tau hais tias lub cev muaj ob daim ntawv theej ntawm tib qho allele ntawm cov noob. Hauv lwm lo lus, ob qho alleles ntawm cov noob yog tib yam hauv ib tus neeg homozygous. Yog hais tias nws nqa ob daim ntawv luam ntawm cov tseem ceeb allele, nws yog hu ua homozygous dominant. Homozygous dominant qhia qhov tseem ceeb phenotype. Ib yam li ntawd, yog tias nws nqa ob daim ntawv theej ntawm recessive allele, nws yog hu ua homozygous recessive. Yog li ntawd, homozygous recessive qhia qhov recessive phenotype.
Daim duab 01: Homozygous
Piv txwv li, R yog cov tseem ceeb allele uas sawv cev rau cov noob puag ncig, thaum r yog cov allele recessive uas sawv cev rau cov noob wrinkled. Yog li ntawd, homozygous dominant yog lub xeev ntawm RR thaum homozygous recessive yog lub xeev rr. Ob leeg RR thiab rr yog homozygous.
Hemizygous yog dab tsi?
Hemizygous yog lub xeev ntawm tsuas muaj ib qho allele rau cov noob. Yog li ntawd, cov noob no tsis muaj ob daim qauv ntawm cov noob. Cov txiv neej muaj XY sib deev chromosome khub. Yog li ntawd, tag nrho cov noob hauv X chromosome yog hemizygous vim tias lawv muaj nyob hauv ib daim qauv hauv X chromosome.
Daim duab 02: Hemizygous
Txiv neej yog hemizygous rau cov noob hauv X chromosome. Yog li, hemizygosity feem ntau yog siv los piav txog X txuas cov noob hauv txiv neej. Ntxiv mus, hauv cov hlwb somatic, kab mob qog noj ntshav yog hemizygous rau qee cov alleles lossis chromosome ntu.
Dab tsi zoo sib xws ntawm Homozygous thiab Hemizygous?
- Homozygous thiab hemizygous yog ob hom zygosity.
- Ob hom muaj tsawg kawg yog ib daim qauv ntawm cov noob.
- txiv neej muaj homozygous thiab hemizygous noob.
Qhov txawv ntawm Homozygous thiab Hemizygous yog dab tsi?
Homozygous yog hom zygosity uas ob leeg alleles yog tib yam rau cov noob. Ntawm qhov tod tes, hemizygous yog hom zygosity uas tsuas yog ib qho allele tam sim no rau cov noob. Yog li, qhov no yog qhov sib txawv tseem ceeb ntawm homozygous thiab hemizygous. Tsis tas li ntawd, muaj ob qho alleles hauv homozygous genes thaum tsuas yog ib qho allele nyob hauv cov noob caj noob ces.
Ntxiv mus, homozygous dominant lossis homozygous recessive yog ob hom homozygosity, thaum hemizygosity tuaj yeem muaj cov tseem ceeb allele lossis recessive allele. Yog li ntawd, homozygous tuaj yeem piav raws li XAXA lossis XaXa thaum hemizygous XaY or XAY.
Cov lus hauv qab no qhia txog qhov sib txawv ntawm homozygous thiab hemizygous.
Summary – Homozygous vs Hemizygous
Homozygous genes muaj ob hom alleles zoo sib xws. Yog hais tias ib tug noob muaj ob qho tseem ceeb alleles, peb hu nws homozygous dominant. Nyob rau hauv sib piv, yog hais tias ib tug noob muaj ob recessive alleles, peb hu nws homozygous recessive. Cov noob Hemizygous tsuas muaj ib daim ntawv xwb tsis yog ob daim ntawv luam. Hemizygosity feem ntau yog siv los piav txog X txuas cov noob hauv cov txiv neej vim txiv neej tsuas muaj ib daim qauv ntawm X chromosome. Yog li ntawd, txiv neej muaj hemizygous X txuas cov noob. Yog li, qhov no yog cov ntsiab lus ntawm qhov sib txawv ntawm homozygous thiab hemizygous.
