Video: Yuav ua li cas yog ib tug dominant allele qhia?
2024 Tus sau: Miles Stephen | [email protected]. Kawg hloov kho: 2023-12-15 23:36
Cov yam ntxwv tshwm sim yog vim ob qho tib si alleles ua qhia sib npaug. Ib qho piv txwv ntawm qhov no yog pawg ntshav AB uas yog qhov tshwm sim ntawm kev sib koom ua ke ntawm A thiab B tseem ceeb alleles . Recessive alleles tsuas yog qhia lawv cov txiaj ntsig yog tias tus neeg muaj ob daim ntawv theej allele (tseem hu ua homozygous?).
Raws li txoj cai, yog vim li cas cov tseem ceeb alleles qhia tshaj recessive?
Dominant txhais tau tias yog koj muaj ib daim ntawv luam ntawm ib qho allele , tsis muaj txoj hauv kev uas tsis yog kuaj DNA los qhia seb koj puas tau txais ib daim qauv ntawm lwm tus allele ntawm qhov chaw. Rov qab txhais tau tias koj yuav pom tsis muaj laj thawj ntseeg li ntawd allele tam sim no tsuas yog muaj 2 daim ntawv theej allele.
dab tsi ua rau allele dominant? Dominant Alleles Ib allele yog tseem ceeb yog nws npog lub xub ntiag ntawm lwm tus alleles . Qhov no txhais tau tias yog lub cev muaj ib qho allele ntawm hom no, nws yuav qhia cov yam ntxwv ntawm qhov zoo. Piv txwv li, hauv tib neeg, cov plaub hau tsaus yog tseem ceeb tshaj cov plaub hau daj.
Ua raws li qhov no hauv kev xav, puas yog cov noob tseem ceeb ib txwm qhia?
Kev piav qhia: Alleles uas nthuav tawm tiav kev tswj hwm yuav ib txwm ua qhia nyob rau hauv lub cell phenotype. Txawm li cas los xij, qee zaum kev tswj hwm ntawm ib qho allele tsis tiav. Nyob rau hauv tas li ntawd, yog hais tias ib tug cell muaj ib tug tseem ceeb thiab ib rov ua dua allele (piv txwv li heterozygous), lub cell tuaj yeem pom cov phenotypes nruab nrab.
Koj ua li cas txiav txim siab cov noob caj noob ces?
Txiav txim siab seb qhov zoo li cas tseem ceeb los yog recessive. Yog qhov zoo tseem ceeb , ib tug ntawm cov niam txiv yuav tsum muaj tus cwj pwm zoo. Dominant yam zoo yuav tsis hla ib tiam. Yog hais tias tus cwj pwm tsis zoo, tsis muaj leej niam leej txiv yuav tsum muaj qhov zoo vim lawv tuaj yeem ua tau heterozygous.
Pom zoo:
Yuav ua li cas koj qhia yog hais tias ib tug transformation yog ib tug dilation?
Ib qho kev piav qhia ntawm qhov dilation suav nrog qhov ntsuas qhov ntsuas (lossis qhov piv) thiab qhov nruab nrab ntawm qhov dilation. Qhov chaw ntawm dilation yog ib qho chaw ruaj khov hauv lub dav hlau. Yog tias qhov ntsuas qhov ntsuas ntau dua 1, daim duab yog qhov loj (qhov ncab). Yog tias qhov ntsuas qhov ntsuas nyob nruab nrab ntawm 0 thiab 1, daim duab yog qhov txo qis (qhov qis)
Yuav ua li cas yog qhov tshwm sim uas ib tug poj niam dig muag xim uas yuav ib tug txiv neej uas tsis pom kev zoo yuav muaj xim dig muag me nyuam?
Yog tias tus poj niam uas muaj lub zeem muag zoo li no (heterozygous rau qhov muag tsis pom xim) yuav ib tug txiv neej ib txwm muaj (XY), cov xeeb ceem hauv qab no tuaj yeem xav tau hauv F2 tiam: ntawm cov ntxhais, 50% yog ib txwm muaj thiab 50% yog cov neeg nqa khoom rau cov kab mob; ntawm cov tub, 50% yog xim dig muag thiab 50% yog qhov pom kev zoo
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