Video: Puas yog Blonde yog ib qho tseem ceeb lossis cov noob caj noob ces?
2024 Tus sau: Miles Stephen | [email protected]. Kawg hloov kho: 2023-12-15 23:36
Cov noob caj noob ces ntawm cov xim plaub hau tseem tsis tau ruaj khov. Raws li ib txoj kev xav, tsawg kawg yog ob noob khub tswj tib neeg cov plaub hau xim. Ib phenotype (xim av / pojniam plaub hau daj ) muaj a tseem ceeb brown allele thiab a rov ua dua blond allele. Ib tug neeg uas muaj xim av allele yuav muaj plaub hau xim av; ib tug neeg uas tsis muaj xim av alleles yuav blond.
Kuj nug, yog cov plaub hau daj ntseg dominant lossis recessive?
Zuag qhia tag nrho, cov me nyuam yuav muaj tag nrho peb qhov sib txawv plaub hau xim nyob ntawm cov noob caj noob ces ntawm cov niam txiv. Cov plaub hau daj yog rov ua dua yog li ntawd lub dav hlau dub plaub hau niam txiv yuav nqa cov noob, ua rau ib tug pojniam plaub hau daj tus menyuam. Nws yog ua tau kom tau liab plaub hau ib yam nkaus yog nyob rau hauv niam txiv cov noob caj noob ces.
Ib sab saum toj no, ob niam txiv cov plaub hau dub puas tuaj yeem muaj tus menyuam daj ntseg? Yog, cov noob rau lub teeb los yog plaub hau daj yog recessive rau cov plaub hau tsaus , txhais tau tias koj xav tau ob cov ntawv luam ntawm cov daj ntseg gene (ib tug los ntawm niam, ib tug los ntawm txiv) rau muaj blond plaub hau tus menyuam . Yog tias tus menyuam tau ib daim ntawv rau cov plaub hau tsaus thiab ib daim ntawv rau daj ntseg , cov yuav tsaus yuav dominent, txhais tau tias tus me nyuam yuav muaj plaub hau tsaus.
Ua li no, leej niam leej txiv twg txiav txim siab xim plaub hau?
Vim cov plaub hau-xim noob yog additive ntau dua li dominant los yog recessive, a tus menyuam tej zaum yuav muaj cov plaub hau txawv heev los ntawm nws niam nws txiv. Txawm li cas los xij, cov niam txiv uas muaj lub teeb heev lossis cov plaub hau tsaus nti yuav muaj coob tus "tawm" lossis "rau" cov plaub hau xim.
Cov plaub hau daj thiab xiav qhov muag puas yog cov noob caj noob ces?
Yuav kom cov no yam ntxwv los qhia outwardly, ib tug neeg yuav tsum tau muaj ob tug recessive noob -ib tug los ntawm txhua tus niam txiv. Hom cov yam ntxwv zoo yog siab, plaub hau daj, thiab xiav ob lub qhov muag.
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)
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
Vim li cas kev nkag siab txog noob caj noob ces tseem ceeb rau cov tub ntxhais kawm?
Vim li cas kev kawm noob caj noob ces tseem ceeb? Nyob rau yav tom ntej, cov kws kho mob thiab cov kws tshawb fawb vam tias yuav siv peb cov ntaub ntawv caj ces los kuaj, kho, tiv thaiv thiab kho ntau yam mob. Cov noob yog cov lus qhia, uas qhia koj lub cev yuav ua li cas ua kom tag nrho cov proteins nws xav tau kom muaj sia nyob thiab loj hlob
Cov plaub hau xim dab tsi yog cov noob caj noob ces?
Raws li ib txoj kev xav, tsawg kawg yog ob lub noob caj noob ces tswj tib neeg cov plaub hau xim. Ib qho phenotype (xim av / xim daj) muaj lub ntsej muag xim av thiab lub ntsej muag daj daj. Ib tug neeg uas muaj xim av allele yuav muaj plaub hau xim av; ib tug neeg uas tsis muaj xim av alleles yuav blond