Video: Dab tsi yog f1 tiam hauv noob caj noob ces?
2024 Tus sau: Miles Stephen | [email protected]. Kawg hloov kho: 2023-12-15 23:36
Cov F1 tiam hais txog thawj filial tiam . Filial tiam yog cov nomenclaturegiven rau cov txheej txheem tom ntej ntawm cov xeeb leej xeeb ntxwv los ntawm kev tswj los yog soj ntsuam kev tsim tawm. Qhov pib tiam tau muab tsab ntawv “P” rau niam txiv tiam.
Ib yam li ntawd, koj tuaj yeem nug, qhov txawv ntawm P tiam thiab tiam f1 yog dab tsi?
P txhais tias niam txiv tiam thiab lawv tsuas yog cov nroj tsuag ntshiab xwb, F1 txhais tau tias ua ntej tiam thiab lawv yog tag nrho cov hybrids uas qhia txog tus cwj pwm tseem ceeb, thiab F2 txhais tau tias thib ob tiam , uas yog cov xeeb ntxwv ntawm P . Yog hais tias ib tug neeg muaj ib tug tseem ceeb allele, nws yuav qhia.
Qhov thib ob, dab tsi yog lub cim f2 hauv cov noob caj noob ces? Cov me nyuam los ntawm F1 tiam suav nrog cov thib ob filial tiam (los yog F2 tiam ). Bydefinition, lub F2 tiam yog qhov tshwm sim ntawm qhov sib txawv ntawm ob tus neeg F1 (los ntawm F1 tiam ).
Tsis tas li ntawd, dab tsi yog lub cim f1 hauv Punnett square?
F1 tiam : Thawj tiam cov xeeb ntxwv los ntawm P tiam (txhais tau tias thawj filial: Latin rau "tus tub") F2 tiam : Qhov thib ob tiam cov xeeb ntxwv los ntawm P tiam (txhais tau tias thawj filial: Latin rau "tus tub") Monohybrid Cross: Kuj tseem hu ua Single-Factor Cross. Tsuas yog ib qho kev zoo yog siv nyob rau hauv cov noob caj noob ces.
F hauv f1 sawv cev rau dab tsi?
Ib F1 Hybrid (tseem hu ua filial 1 hybrid) yog cov thawj filial tiam ntawm cov xeeb ntxwv ntawm cov niam txiv sib txawv. Hauv nws qhov kev sim hla-pollination nrog ob qhov tseeb-loj hlob, lossis homozygous, niam txiv, Mendel pom tias qhov tshwm sim. F1 tiam tau heterozygous thiab sib xws.
Pom zoo:
Dab tsi yog txhais los ntawm cov noob tseem ceeb thiab cov noob caj noob ces?
(Nyob rau hauv cov ntsiab lus ntawm caj ces, ib qho tseem ceeb tshaj plaws yog ib qho uas yog phenotypically qhia hauv heterozygotes). Ib qho tseem ceeb tshaj plaws yog tawm tsam qhov tsis zoo uas tshwm sim tsuas yog thaum muaj ob daim ntawv theej ntawm cov noob. (Nyob rau hauv cov ntsiab lus genetic, ib tug recessive zoo yog ib tug uas yog phenotypically qhia tsuas yog nyob rau hauv homozygotes)
Dab tsi yog qhov txawv ntawm P tiam f1 tiam thiab f2 tiam?
P txhais tau hais tias niam txiv tiam thiab lawv tsuas yog cov nroj tsuag ntshiab xwb, F1 txhais tau tias thawj tiam thiab lawv yog tag nrho cov hybrids uas qhia qhov tseem ceeb, thiab F2 txhais tau tias tiam thib ob, uas yog cov xeeb ntxwv ntawm P. Yog hais tias ib tug neeg muaj ib tug tseem ceeb allele, nws yuav. ua yeeb yam
Dab tsi yog qhov kev kuaj hla hauv cov noob caj noob ces?
Nyob rau hauv cov noob caj noob ces, ib qho kev sim hla, thawj zaug qhia los ntawm Gregor Mendel, koom nrog kev yug me nyuam ntawm ib tus neeg nrog phenotypically recessive tus neeg, txhawm rau txiav txim siab zygosity ntawm yav dhau los los ntawm kev txheeb xyuas qhov feem ntawm cov xeeb ntxwv phenotypes. Zygosity tuaj yeem yog heterozygous lossis homozygous
Dab tsi yog qhov tsis tiav dominance hauv noob caj noob ces?
Incomplete dominance yog ib daim ntawv ntawm cov qub txeeg qub teg hauv nruab nrab uas ib qho allele rau ib qho tshwj xeeb tsis qhia tag nrho nws cov khub allele. Qhov no tshwm sim nyob rau hauv ib tug thib peb phenotype nyob rau hauv uas qhia lub cev zoo yog ib tug ua ke ntawm cov phenotypes ntawm ob alleles
Dab tsi yog Codominance hauv cov noob caj noob ces tsis yog Mendelian?
Thaum cov alleles rau ib qho kev coj cwj pwm yog codominant, lawv ob leeg qhia sib npaug es tsis yog ib qho tseem ceeb allele noj tag nrho cov kev tswj ntawm ib qho allele recessive. Qhov no txhais tau hais tias thaum lub cev muaj ob qhov sib txawv alleles (piv txwv li, yog heterozygote), nws yuav qhia ob qho tib si tib lub sijhawm