Video: Qhov feem pua ntawm cov me nyuam yuav muaj paj dawb?
2024 Tus sau: Miles Stephen | [email protected]. Kawg hloov kho: 2023-12-15 23:36
Predicting Offspring Phenotypes
Yog li ntawd, nyob rau hauv tus ntoo khaub lig no, koj xav kom peb tawm ntawm plaub ( 75 feem pua ) ntawm cov xeeb leej xeeb ntxwv kom muaj paj ntshav thiab ib qho ntawm plaub ( 25 feem pua ) kom muaj paj dawb.
Yog li ntawd, dab tsi yog lub caij nyoog uas cov xeeb ntxwv yuav luv luv nrog paj dawb?
Ib tsob ntoo siab nrog paj dawb (TTbb) hla nrog a luv cog nrog xiav paj (ttBB) the muaj caij nyoog uas cov xeeb ntxwv yuav luv luv nrog paj dawb yog 50%.
Ib sab saum toj no, dab tsi yog genotype ntawm tag nrho cov xeeb ntxwv? Predicting tus genotype ntawm xeeb Muaj plaub qhov sib xyaw ua ke ntawm gametes rau AaBb niam txiv. Ib nrab ntawm gametes tau txais qhov tseem ceeb A thiab qhov tseem ceeb B allele; Lwm ib nrab ntawm gametes tau txais ib qho recessive a thiab recessive b allele. Ob leeg niam txiv tsim 25% txhua ntawm AB, Ab, aB, thiab ab.
Ntawm no, qhov feem pua ntawm cov xeeb ntxwv yog dab tsi?
| Niam Txiv GENOTYPES | PHEM PHEM |
|---|---|
| ntshiab (homozygous) dominant x dab tsi | 100% ntawm cov xeeb leej xeeb ntxwv nrog tus cwj pwm tseem ceeb |
| hybrid x homozygous recessive | 50% dominant trait, 50% recessive zoo |
| hybrid x hybrid | 75% nrog tus cwj pwm tseem ceeb & 25% nrog tus cwj pwm tsis zoo |
| homozygous recessive x homozygous recessive | 100% recessive zoo |
Dab tsi yog qhov tshwm sim ntawm cov xeeb ntxwv uas muaj YY genotype?
Hauv lwm qhov piv txwv (pom hauv qab), yog tias niam txiv cog ob qho tib si muaj heterozygous (YG) genotypes , yuav muaj 25% YY , 50% YG, thiab 25% GG xeeb nyob nruab nrab. Cov feem pua yog txiav txim siab raws li qhov tseeb tias txhua tus ntawm 4 xeeb cov thawv hauv Punnett square yog 25% (1 ntawm 4).
Pom zoo:
Yuav ua li cas koj sau ib feem raws li ib tug khoom ntawm ib tug tag nrho cov zauv thiab ib feem feem?
Cov cai los nrhiav cov khoom ntawm ib feem feem thiab tag nrho tus lej Peb xub sau tag nrho cov lej ua ib feem, piv txwv li, sau nws faib los ntawm ib qho; Piv txwv li: 7 yog sau ua 71. Peb mam li muab cov zauv. Peb muab cov denominators. Yog tias yuav tsum tau ua kom yooj yim, nws ua tiav thiab tom qab ntawd peb sau cov feem kawg
Dab tsi yog qhov feem pua enantiomeric tshaj ntawm qhov sib tov uas muaj 86?
Enantiomeric tshaj (ee): Qhov ntau tshaj ntawm ib qho enantiomer tshaj qhov sib tov ntawm enantiomers. Qhia lej: enantiomeric tshaj = % ntawm cov enantiomer loj - % ntawm cov me me enantiomer. Piv txwv li: Ib qho kev sib xyaw ua ke ntawm 86% R enantiomer thiab 14% S enantiomer muaj 86% - 14% = 72% ee
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
Qhov feem pua ntawm cov pa muaj nyob hauv cov CaCO3?
Elemental muaj pes tsawg leeg ntawm CaCO3 * 3Ca3 (PO4)2 Element Symbol Mass% Calcium Ca 38.8874 Carbon C 1.1654 Oxygen O 41.9151 Phosphorus P 18.0322
Txoj cai thermodynamic twg hais tias koj Tsis tuaj yeem hloov 100 feem pua ntawm cov cua sov rau hauv cov khoom siv hluav taws xob ntawm cov lus teb xaiv?
Txoj Cai thib ob