Video: Puas yog Down Syndrome tshwm sim hauv mitosis lossis meiosis?
2024 Tus sau: Miles Stephen | [email protected]. Kawg hloov kho: 2023-12-15 23:36
Thaum cell faib ( mob mitosis thiab meiosis ) chromosomes sib cais thiab txav mus rau cov ncej. Down syndrome tshwm sim thaum kev tsis sib haum xeeb tshwm sim Nrog Chromosome 21. Meiosis yog hom tshwj xeeb ntawm cell faib siv los tsim peb cov phev thiab qe qe.
Ntawm no, Down syndrome tshwm sim hauv meiosis li cas?
Thaum ob leeg mob mitosis thiab meiosis , muaj ib theem uas txhua tus khub chromosome hauv ib lub xovtooj sib cais, kom txhua lub xovtooj tshiab tuaj yeem tau txais ib daim qauv ntawm txhua tus chromosome. Nrog Down syndrome , ntau hom kev sib cais chromosome tsis sib xws ua rau tus neeg muaj ib daim ntawv luam ntxiv (lossis ib nrab daim ntawv) ntawm chromosome 21.
Tsis tas li ntawd, Down syndrome tshwm sim thaum cev xeeb tub? Down syndrome tshwm sim Thaum tus me nyuam yug los nrog ib daim ntawv luam ntxiv ntawm chromosome 21 hauv lawv cov hlwb ( Down syndrome tseem hu ua 'trisomy 21'). Qhov no tshwm sim random thaum lub sij hawm conception.
Ib tug kuj nug, puas yog Down syndrome tshwm sim hauv meiosis 1 lossis 2?
Kev tsis sib haum xeeb tshwm sim thaum homologous chromosomes ( meiosis Kuv) los yog tus muam chromatids ( meiosis II ) tsis sib cais thaum lub sij hawm meiosis . Feem ntau trisomy yog chromosome 21, uas ua rau Down syndrome.
Qhov txawv txav meiosis ua rau Down syndrome li cas?
Yog tus muam chromatids tsis cais thaum lub sij hawm meiosis II, qhov tshwm sim yog ib gamete uas tsis muaj cov chromosome, ob gametes ib txwm nrog ib daim qauv ntawm chromosome, thiab ib gamete nrog ob daim ntawv theej ntawm chromosome. Feem ntau trisomy yog chromosome 21, uas ua rau Down syndrome.
Pom zoo:
Qhov twg tshwm sim thawj lub teeb nyob ntawm qhov tshwm sim lossis lub teeb ywj pheej?
Lub Teeb-Dependent thiab Lub Teeb-Independent Reactions. Cov tshuaj tiv thaiv lub teeb, lossis cov tshuaj tiv thaiv lub teeb-dependent, yog thawj zaug. Peb hu lawv ob leeg thiab ob lub npe. Nyob rau hauv lub teeb-dependent tshwm sim ntawm photosynthesis, lub zog ntawm lub teeb propels lub electrons los ntawm ib tug photosystem mus rau lub high-zog lub xeev
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Down syndrome tshwm sim li cas thaum lub sij hawm meiosis?
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Tam sim ntawd yuav siv dab tsi yog tias koj cov khaub ncaws raug hluav taws lossis yog tias muaj tshuaj lom loj tshwm sim ntawm koj cov khaub ncaws?
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