Video: Qhov tshwm sim yog dab tsi uas lawv tus menyuam yuav muaj tus kabmob?
2024 Tus sau: Miles Stephen | [email protected]. Kawg hloov kho: 2023-12-15 23:36
Feem ntau, yog ib tug niam txiv tsis yog ib carrier, ua qhov tshwm sim uas tus me nyuam yuav ua tus cab kuj yog: ½ zaug (tus qhov tshwm sim lwm tus niam txiv yog ib tus cab kuj). Uas yog, peb multiply qhov tshwm sim ntawm dhau ib kab mob allele, ½, zaug qhov tshwm sim uas niam txiv ua, qhov tseeb, nqa lub kab mob allele.
Ua raws li qhov no hauv kev txiav txim siab, qhov tshwm sim ntawm qhov qub txeeg qub teg yog dab tsi?
Cov qhov tshwm sim ntawm ib tsob nroj uas tau txais tus P lossis p allele los ntawm niam txiv heterozygous yog ½. Multiply Qhov yuav tshwm sim ntawm inheriting ob alleles mus nrhiav tus qhov tshwm sim tias ib tsob nroj yuav yog pp homozygote. Tsuas yog 25%, lossis ib qho txiaj ntsig ntawm plaub, yuav ua rau cov nroj tsuag homozygous rau xim paj dawb (pp).
Qhov thib ob, qhov tshwm sim yog dab tsi uas lawv cov menyuam tom ntej yuav muaj PKU? Yog hais tias lawv yog ob qho tib si heterozygous, ces ib feem peb ntawm lawv menyuam yuav muaj PKU , yog li ntawd probability uas lawv ua ntej tus me nyuam yuav muaj PKU yog 1/4, thiab qhov tshwm sim ntawm lawv ua heterozygous thiab ntawm lawv ua ntej tus menyuam muaj PKU 4/9 × 1/4 = 4/36 = 1/9, uas yog cov lus teb rau lo lus nug.
Ntawm no, cov kab mob dab tsi tuaj yeem kis los ntawm niam txiv mus rau lawv cov menyuam?
Genetic tej yam kev mob feem ntau hu ua hereditary vim lawv tuaj yeem kis los ntawm niam txiv mus rau lawv cov menyuam.
Piv txwv ntawm cov kab mob genetic muaj xws li:
- qee cov qog nqaij hlav.
- cystic fibrosis.
- cov roj cholesterol siab.
- hamophilia.
- muscular dystrophy.
- yug tsis xws luag (piv txwv li, spina bifida los yog cleft di ncauj).
Yuav ua li cas koj xam genetic probability?
Txij li thaum noob yog unlinked, cov no yog plaub yam kev ywj pheej, yog li peb ua tau xam ib qhov tshwm sim rau txhua tus thiab ces muab cov Qhov yuav tshwm sim kom tau qhov tshwm sim ntawm tag nrho cov txiaj ntsig. Cov qhov tshwm sim ntawm tau txais ib lossis ntau daim ntawv luam ntawm qhov tseem ceeb A allele yog 3/4 3/4 3/4.
Pom zoo:
Dab tsi tshwm sim ntawm Theodor Engelmann qhov kev sim nto moo qhia rau nws uas wavelength S yog tus tsav tsheb zoo tshaj plaws ntawm photosynthesis?
Cov kab mob sib sau ua ke ntau tshaj plaws nyob ze ntawm ib feem ntawm cov alga uas tau nthuav tawm cov xim liab thiab xiav wavelengths. Engelmann qhov kev sim ua kom pom tias lub teeb liab thiab xiav yog lub zog zoo tshaj plaws rau photosynthesis
Tus qauv yuav pab nrhiav qhov tshwm sim ntawm qhov kev tshwm sim sib xyaw li cas?
Lub ntsiab lus ntawm Qhov Muaj Peev Xwm Txheej Txheej Txheej Txheej Txheej Txheej Txheej Txheej Txheej Txheej Txheej Txheej yog ib qho uas muaj ntau tshaj li qhov ua tau. Kev txiav txim siab qhov yuav tshwm sim ntawm qhov kev tshwm sim sib xyaw suav nrog kev nrhiav cov lej ntawm qhov tshwm sim ntawm tus kheej cov xwm txheej thiab, yog tias tsim nyog, tshem tawm qhov muaj feem sib tshooj
Dab tsi ntawm cov txheej txheem tsim hluav taws xob hauv qab no yog tib qho uas tshwm sim hauv txhua yam kabmob muaj sia?
Dab tsi ntawm cov txheej txheem tsim hluav taws xob hauv qab no yog tib qho uas tshwm sim hauv txhua yam kabmob muaj sia? Glycolysis: tshwm sim hauv txhua lub cell
Dab tsi yog peb qhov kev soj ntsuam uas yuav qhia tau tias muaj tshuaj lom neeg tshwm sim?
Cov hauv qab no tuaj yeem qhia tau tias kev hloov tshuaj lom neeg tau tshwm sim, txawm hais tias cov pov thawj no tsis muaj tseeb: Hloov cov ntxhiab tsw. Hloov cov xim (piv txwv li, nyiaj rau reddish-xim av thaum hlau xeb). Hloov hauv qhov kub lossis lub zog, xws li kev tsim khoom (exothermic) lossis poob (endothermic) ntawm tshav kub
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