Video: Dab tsi yog qhov tseem ceeb ntawm cov txiv laum huab xeeb?
2024 Tus sau: Miles Stephen | [email protected]. Kawg hloov kho: 2023-12-15 23:36
Tshawb nrhiav
| Yam ntxwv | Dominant Expression | Recessive Expression |
|---|---|---|
| Daim ntawv ntawm ripe noob (R) | du | Wrinkled |
| Xim ntawm noob albumen (Y) | Daj | Ntsuab |
| Xim paj (P) | Ntshav | Dawb |
| Daim ntawv ntawm ripe pods (I) | Inflated | Constricted |
Tsis tas li ntawd, qhov twg yog qhov tseem ceeb tshaj plaws uas Mendel tau pom hauv cov txiv laum huab xeeb?
Kev nkag siab Cov yam ntxwv tseem ceeb Es tsis txhob, tus me nyuam los ntawm tus ntoo khaub lig no tsuas muaj cov noob du. Nyob rau hauv dav dav, yog hais tias tus progeny ntawm crosses ntawm purebred nroj tsuag zoo nkaus li tsuas yog ib tug ntawm cov niam txiv hais txog ib qho tshwj xeeb qhov zoo , Mendel hu ua niam txiv qhia qhov zoo tus qhov tseem ceeb.
Dab tsi yog 7 tus yam ntxwv Mendel tau kawm ntawm cov txiv laum huab xeeb? Tom qab pib qhov kev sim nrog txiv laum huab xeeb , Mendel txiav txim rau kawm xya yam uas zoo li tau txais los ntawm nws tus kheej ntawm lwm tus yam ntxwv : noob zoo, paj xim, noob lub tsho tint, pod shape, unripe pod xim, paj qhov chaw, thiab cog qhov siab.
Ntxiv mus, dab tsi zoo ntawm pea nroj tsuag tau kawm?
Cov qhov zoo uas yog tab tom kawm yog qhov siab ntawm txiv laum huab xeeb.
Dab tsi ntawm cov yam ntxwv hauv qab no nyob rau hauv pea cog yog recessive?
Qee qhov sib txawv yam ntxwv xaiv tau cov noob du lossis wrinkled, daj lossis ntsuab noob, inflated (tag nrho) los yog constricted ntsuab los yog daj pods thiab siab los yog dwarf nroj tsuag . Hauv cov no ntsuab pod yog qhov tseem ceeb qhov zoo thiab lub taub hau daj yog a rov zoo li qub . Yog li ntawd, ib tug ntsuab pod yog ib tug dominant zoo nyob rau hauv peas.
Pom zoo:
Vim li cas qhov tseem ceeb ntawm qhov tseem ceeb?
Thaum koj pom tus nqi kiag li hauv qhov teeb meem lossis qhov sib npaug, nws txhais tau hais tias txhua yam nyob hauv tus nqi tiag tiag yog qhov zoo. Cov txiaj ntsig tsis zoo feem ntau siv rau hauv cov teeb meem cuam tshuam nrog kev nyob deb thiab qee zaum siv nrog qhov tsis sib xws. Qhov ntawd yog qhov tseem ceeb uas yuav tsum nco ntsoov nws zoo li qhov deb ntawm xoom
Vim li cas Mendel siv cov txiv laum huab xeeb rau nws qhov kev sim?
(a) Mendel xaiv cov txiv hmab txiv ntoo cog rau nws qhov kev sim vim yog cov yam ntxwv hauv qab no: (i) Cov paj ntawm cov nroj tsuag no yog bisexual. (ii) Lawv yog tus kheej-pollinating, thiab yog li, tus kheej thiab tus ntoo khaub lig pollination tuaj yeem ua tau yooj yim. (iv) Lawv muaj lub neej luv luv thiab yog cov nroj tsuag yooj yim rau kev tswj hwm
Vim li cas Gregor Mendel siv cov txiv laum huab xeeb hauv nws qhov kev sim?
Txhawm rau kawm txog noob caj noob ces, Mendel tau xaiv los ua haujlwm nrog cov txiv laum huab xeeb vim tias lawv muaj cov cim qhia tau yooj yim (Daim duab hauv qab). Piv txwv li, cov txiv laum huab xeeb yog qhov siab lossis luv, uas yog qhov yooj yim rau kev saib xyuas. Mendel kuj tau siv cov txiv laum huab xeeb vim tias lawv tuaj yeem ua rau tus kheej pollinate los yog hla-pollinated
Dab tsi yog qhov txawv ntawm cov khoom tseem ceeb thiab cov kab hauv cov dej hiav txwv?
Ib cag ntawm 12 lub ntsiab lus uas yog cov ntsiab lus tseem ceeb lossis cov ntsiab lus me thiab qee cov ntsiab lus uas yog cov roj yaj, tag nrho lwm cov ntsiab lus yaj hauv dej hiav txwv muaj nyob rau hauv cov ntsiab lus tsawg dua 1 ppm thiab hu ua cov kab hauv qab. Ntau cov kab ke tseem ceeb rau lub neej
Dab tsi yog qhov tseem ceeb tshaj plaws uas yuav tsum muaj rau cov kua dej ntws hauv cov kav dej Dab tsi lwm yam cuam tshuam rau cov dej ntws?
Thaum ib qho kev quab yuam sab nraud yog exerted rau ntawm cov kua uas muaj, qhov tshwm sim siab yog kis sib npaug thoob plaws hauv cov kua. Yog li txhawm rau kom dej ntws, dej xav tau qhov sib txawv siab. Cov kav dej kuj tuaj yeem cuam tshuam los ntawm cov kua dej, cov yeeb nkab loj, qhov kub thiab txias (cov kav dej khov), cov kua dej ntom ntom