Video: Dab tsi yog genotype ntawm Dihybrid ntoo khaub lig?
2024 Tus sau: Miles Stephen | [email protected]. Kawg hloov kho: 2023-12-15 23:36
Yog li ntawd, a dihybrid kab mob yog ib qho heterozygous ntawm ob hom kab mob sib txawv. Cov kab mob hauv qhov pib ntoo khaub lig hu ua niam txiv, los yog P tiam. Cov xeeb ntxwv ntawm RRYY x rryy ntoo khaub lig , uas yog hu ua F1 tiam, yog tag nrho cov heterozygous nroj tsuag nrog puag ncig, daj noob thiab cov genotype RrYY.
Ib yam li ntawd, nws tau nug, dab tsi yog qhov genotype piv hauv Dihybrid cross?
Hauv no Dihybrid Cross , homozygous dominant traits tau hla nrog homozygous recessive traits. Qhov tshwj xeeb no ntoo khaub lig ib txwm tshwm sim hauv phenotypic piv ntawm 1: 0: 0: 0 txhais tau hais tias cov xeeb leej xeeb ntxwv yuav muaj ob qho tib si phenotypes tab sis yuav yog cov nqa ntawm cov phenotypes recessive.
Ib yam li ntawd, koj ua li cas sau tus ntoo khaub lig Dihybrid? Nws yog ib qho tseem ceeb uas koj ua raws li cov kauj ruam tsim nyog!
- Ua ntej koj yuav tsum tsim kom koj tus menyuam hla kev, lossis P1.
- Tom ntej no koj yuav tsum ua 16 square Punnett Square rau koj 2 yam koj xav hla.
- Cov kauj ruam tom ntej yog los txiav txim cov genotypes ntawm ob niam txiv thiab muab lawv cov ntawv los sawv cev rau cov alleles.
Nyob rau hauv kev hwm rau qhov no, koj yuav ua li cas nrhiav tau lub genotype ntawm tus ntoo khaub lig Dihybrid?
Predicting tus genotype ntawm cov xeeb ntxwv Txiav txim siab txhua qhov ua tau sib txuas ntawm alleles hauv gametes rau txhua tus niam txiv. Ib nrab ntawm gametes tau txais qhov tseem ceeb S thiab tus tseem ceeb Y allele; Lwm ib nrab ntawm gametes tau txais ib qho recessive s thiab recessive y allele. Ob leeg niam txiv tsim 25% txhua ntawm SY, Sy, sY, thiab sy.
Dab tsi ntawm tus ntoo khaub lig ua rau 1 2 1 phenotypic piv?
Qhov xav tau genotype piv thaum ob heterozygotes yog hla yog 1 (homozygous dominant): 2 (heterozygous): 1 (homozygous recessive). Thaum a phenotypic piv ntawm 2 : 1 tau pom, muaj tej zaum ib tug tuag allele.
Pom zoo:
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Tam sim ntawd yuav siv dab tsi yog tias koj cov khaub ncaws raug hluav taws lossis yog tias muaj tshuaj lom loj tshwm sim ntawm koj cov khaub ncaws?
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