Video: Dab tsi yog genotype hauv cov noob caj noob ces?
2024 Tus sau: Miles Stephen | [email protected]. Kawg hloov kho: 2023-12-15 23:36
Hauv kev nkag siab dav, lo lus " genotype " hais txog cov caj ces pleev ntawm lub cev; nyob rau hauv lwm yam lus, nws piav qhia txog lub cev tag nrho ntawm noob . Txhua khub ntawm alleles sawv cev rau genotype ntawm ib tug tshwj xeeb gene. Piv txwv li, nyob rau hauv cov txiv hmab txiv ntoo qab zib, cov noob rau paj xim muaj ob alleles.
Hais txog qhov no, qhov piv txwv genotype yog dab tsi?
Genotype Piv txwv Lo lus tsuas yog txhais tau tias "cov noob caj ces ib yam kabmob muaj." Ib qho piv txwv ntawm a genotype yuav tsuas yog ib daim duab ntawm ib yam khoom muaj sia nyob chromosomes, los yog DNA molecules lub luag hauj lwm rau ntau yam genetic yam ntxwv. Txawm li cas los xij, muaj qee cov genes muaj cov txiaj ntsig pom tau.
Tom qab ntawd, lo lus nug yog, dab tsi yog 3 hom genotypes? Muaj peb muaj genotypes , PP (homozygous dominant), Pp (heterozygous), thiab pp (homozygous recessive). Tag nrho peb muaj txawv genotypes tab sis thawj ob muaj tib yam phenotype (liab ntshav) raws li qhov txawv ntawm peb (dawb).
Ib yam li ntawd, nws raug nug, dab tsi yog genotype vs phenotype?
Genotype piv rau phenotype . Lub cev genotype yog cov noob caj noob ces nws nqa. Lub cev phenotype yog tag nrho nws cov yam ntxwv observable - uas yog cuam tshuam los ntawm nws genotype thiab los ntawm ib puag ncig. Piv txwv li, qhov sib txawv ntawm cov genotypes tuaj yeem tsim qhov sib txawv phenotypes.
Puas yog genotype tib yam li genome?
Genome yog ib txwm hais txog tag nrho cov noob ib zaug. Cov genome / genotype kev txawv txav zoo ib yam li qhov sib txawv ntawm cov noob / allele. Cov genotype txhais tau tias yog dab tsi tshwj xeeb txog DNA rau ib tus neeg. Genotype feem ntau tsuas yog siv thaum tham txog cov noob los yog ob peb lub noob, tab sis nws feem ntau siv rau tag nrho cov noob ib zaug.
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 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
Yuav ua li cas cov khoom siv caj ces hauv txhua lub xov tooj tshiab tsim los ntawm kev faib tawm ntawm tes sib piv nrog cov khoom siv caj ces hauv lub xov tooj qub?
Mitosis tshwm sim nyob rau hauv ob lub nuclei uas zoo tib yam rau thawj nucleus. Yog li, ob lub hlwb tshiab tsim tom qab kev faib tawm ntawm tes muaj tib yam khoom siv caj ces. Thaum lub sij hawm mitosis, chromosomes condense los ntawm chromatin. Thaum saib nrog lub microscope, chromosomes pom nyob rau hauv lub nucleus
Dab tsi yog lub luag haujlwm ntawm cov noob caj noob ces thiab chromosomes hauv kev xeeb tub?
Heredity plays lub luag haujlwm tseem ceeb hauv kev loj hlob ntawm cov yam ntxwv thiab kis tau los ntawm cov noob. Cov yam ntxwv uas peb tau txais los pab txhim kho peb tus cwj pwm, txiav txim siab los ntawm khub niam txiv, ib qho los ntawm txhua tus niam txiv. Cov noob muaj nyob hauv cov qauv zoo li hu ua chromosomes, uas yog tsim los ntawm DNA
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