Video: Cov plaub hau xim dab tsi yog cov noob caj noob ces?
2024 Tus sau: Miles Stephen | [email protected]. Kawg hloov kho: 2023-12-15 23:36
Raws li ib txoj kev xav, tsawg kawg yog ob lub noob caj noob ces tswj tib neeg cov plaub hau xim . Ib phenotype ( xim av / pojniam plaub hau daj ) muaj ib tug dominant xim av allele thiab recessive daj ntseg allele. Ib tug neeg nrog a xim av allele yuav muaj xim av plaub hau; tus neeg tsis muaj xim av alleles yuav daj ntseg.
Ib yam li ntawd, nws yog nug, cov plaub hau xim twg yog qhov tseem ceeb?
plaub hau xim av
Ib tug kuj nug, leej niam leej txiv twg txiav txim plaub hau xim? Thaum twg Cov plaub hau xim Yog Kev Txiav Txim Thaum cov phev ntsib lub qe thiab tsim mus rau hauv zygote, nws feem ntau nce 46 chromosomes. Qhov ntawd yog 23 ntawm leej niam thiab leej txiv. Txhua yam ntawm koj tus menyuam txoj kev caj ces - plaub hau xim , qhov muag xim , kev sib deev, thiab lwm yam - twb raug kaw nyob rau hauv no thaum ntxov theem.
Kuj nug, yog cov plaub hau tsaus nti lossis cov plaub hau teeb tseem ceeb?
Cov plaub hau tsaus yog a tseem ceeb qhov zoo, tawm tsam teeb plaub hau , uas yog recessive. Recessive txhais tau hais tias qhov zoo yuav tsuas qhia yog tias tsis muaj tseem ceeb muaj gene. Yog koj plaub hau yog pojniam plaub hau daj ces koj qhov zoo rau plaub hau yog recessive. Koj yuav tsis muaj noob rau cov plaub hau tsaus.
Cov plaub hau dab tsi yog qhov tseem ceeb tshaj?
Yog li ntawd ib tug dub plaub hau niam txiv nqa ib tug rov ua dua gene rau cov plaub hau daj tuaj yeem muaj peev xwm muaj cov menyuam daj yog tias cov noob tau nthuav tawm thiab sib xyaw nrog cov noob daj los ntawm lwm tus niam txiv. Raws li rau cov plaub hau liab, uas yog ib zaug xav txog rov ua dua , tam sim no nws ntseeg tau tias yog dominant dua blond.
Pom zoo:
Dab tsi yog qhov tseem ceeb ntawm cov noob caj noob ces rau kev loj hlob ntawm fetal?
Kev soj ntsuam ntawm lub luag haujlwm ntawm chromosomes hauv tib neeg txoj kev loj hlob thiab kev loj hlob ntawm lub fetus tau mob siab rau qhov txawv txav ntawm chromosomal. Cov noob muaj cov lus qhia rau kev loj hlob thiab kev loj hlob. Qee qhov kev hloov gene ua rau cov gene faulty kom cov lus nyeem tsis raug lossis tsis nyeem tag nrho los ntawm lub xovtooj ntawm tes
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)
Puas yog cov plaub hau daj lossis cov plaub hau xim av muaj ntau dua?
Cov plaub hau xim av yog qhov tseem ceeb tshaj cov plaub hau daj. Cov me nyuam uas muaj ib tug xim av-haired allele thiab ib tug blonde-haired allele yuav nthuav cov plaub hau xim av thiab. Tsuas yog cov uas muaj ob lub ntsej muag plaub hau daj yuav muaj cov plaub hau daj
Qhov twg ntawm cov plaub hau plaub hau yog ib txwm plaub hau plaub hau?
square Tsis tas li ntawd nug, qhov ntsuas ntawm ib lub quadrilateral tsis tu ncua yog dab tsi? Yog, sab hauv lub kaum sab xis ntawm txhua lub ces kaum ntawm ib lub quadrilateral tsis tu ncua yog txhua 90 degrees (360 degrees / 4 fab).
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