Video: Lub ntsiab lus ntawm homozygous hauv science yog dab tsi?
2024 Tus sau: Miles Stephen | [email protected]. Kawg hloov kho: 2023-12-15 23:36
Homozygous hais txog muaj cov alleles zoo tib yam rau ib qho kev zoo. Ib qho allele sawv cev rau ib hom ntawm cov noob. Alleles tuaj yeem muaj nyob hauv ntau hom thiab cov kab mob diploid feem ntau muaj ob lub alleles rau ib qho zoo. Thaum fertilization, alleles yog random sib koom ua homologous chromosomes khub.
Raws li, homozygous yooj yim txhais yog dab tsi?
Homozygous yog ib lo lus uas hais txog cov noob caj noob ces uas muaj cov alleles zoo tib yam ntawm ob homologous chromosomes. Nws raug xa mus los ntawm ob tus tsiaj ntawv loj (XX) rau qhov tseem ceeb, thiab ob tus tsiaj ntawv me (xx) rau qhov zoo.
Tom qab ntawd, lo lus nug yog, qhov piv txwv ntawm homozygous yog dab tsi? Yog hais tias lub cev muaj ob daim ntawv luam ntawm tib allele, rau piv txwv AA or aa, yog homozygous rau qhov zoo. Yog hais tias lub cev muaj ib daim qauv ntawm ob qho sib txawv alleles, rau piv txwv Aa, nws yog heterozygous.
Ib yam li ntawd, heterozygous hauv science yog dab tsi?
Hauv cov kab mob diploid, heterozygous hais txog ib tus neeg muaj ob qho alleles sib txawv rau ib qho kev tshwj xeeb. Ib qho allele yog cov qauv ntawm cov noob caj noob ces lossis cov DNA tshwj xeeb ntawm cov chromosome. A heterozygous cog yuav muaj cov alleles hauv qab no rau cov noob zoo: (Rr).
Ib qho piv txwv ntawm heterozygous yog dab tsi?
Heterozygous txhais tau hais tias ib tug kab mob muaj ob tug sib txawv alleles ntawm ib tug noob. Rau piv txwv , pea nroj tsuag tuaj yeem muaj paj liab thiab yog homozygous dominant (liab-liab), los yog heterozygous (liab-dawb). Yog hais tias lawv muaj paj dawb, ces lawv yog homozygous recessive (dawb-dawb). Cov neeg nqa khoom ib txwm muaj heterozygous.
Pom zoo:
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