Video: Huntington tus kab mob puas tuaj yeem ua homozygous tseem ceeb?
2024 Tus sau: Miles Stephen | [email protected]. Kawg hloov kho: 2023-12-15 23:36
Homozygosity rau CAG mutation in Huntington tus kab mob yog txuam nrog kev kho mob hnyav dua. Huntington tus kab mob Cov neeg mob uas muaj ob mutant alleles yog tsawg heev. Hauv lwm yam poly (CAG) kab mob xws li cov tseem ceeb ataxia, qub txeeg qub teg ntawm ob mutant alleles ua rau ib tug phenotype hnyav dua nyob rau hauv heterozygotes.
Ib yam li ntawd, yog Huntington tus kab mob homozygous dominant lossis heterozygous?
Cov neeg nqa khoom ib txwm muaj heterozygous . Cov neeg uas muaj CF yog homozygous rov ua dua. Txij li thaum Huntington tus kab mob yog autosomal tseem ceeb , cov neeg nrog kab mob tuaj yeem yog homozygous dominant los yog heterozygous.
Ib tug kuj yuav nug, haiv neeg twg yog Huntington tus kab mob ntau tshaj nyob rau hauv? Huntington tus kab mob cuam tshuam txog kwv yees li 3 txog 7 rau 100,000 tus neeg ntawm cov neeg nyob sab Europe. Cov tsis meej pem zoo li tsawg common nyob rau hauv Qee lwm haiv neeg, suav nrog cov neeg Nyij Pooj, Suav, thiab African qhovntsej thiaj tsis mob.
Dhau li ntawm no, dab tsi genotype yuav ib tug neeg heterozygous nrog Huntington's muaj?
Ib tug yog homozygous (HH) lub heterozygous (Hh) rau cov tseem ceeb allele yuav tsim Huntington tus kab mob. Piv txwv 1, leej niam nqa ib daim qauv ntawm tus Huntington tus allele thiab muaj tus kab mob. Txiv ua tsis nqa lub Huntington tus allele, yog li nws ua tsis yog muaj tus kab mob.
Yuav ua li cas koj paub yog hais tias ib tug genotype yog heterozygous los yog homozygous?
Yog tag nrho cov xeeb leej xeeb ntxwv los ntawm qhov kev ntsuam xyuas tus ntoo khaub lig tso saib phenotype tseem ceeb, tus neeg hauv nqe lus nug yog homozygous tseem ceeb; yog ib nrab ntawm cov xeeb leej xeeb ntxwv tso saib phenotypes thiab ib nrab zaub recessive phenotypes, ces tus neeg yog heterozygous.
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