2024 Tus sau: Elizabeth Oswald | [email protected]. Kawg hloov kho: 2024-01-13 00:07
Kev hloov pauv tshwm sim thaum chromosomes tawg thaum lub sijhawm meiosis thiab cov khoom tawg tau koom nrog lwm tus chromosome. Reciprocal translocations: Nyob rau hauv ib tug sib npaug reciprocal translocation (Fig. 2.3), genetic khoom yog sib pauv ntawm ob chromosomes uas tsis pom kev poob.
Yuav ua li cas yog vim li cas tom qab hloov chaw?
Tus cov khoom siv caj ces los ntawm 21 chromosome ntxivyog qhov ua rau muaj teeb meem kev noj qab haus huv uas tshwm sim los ntawm Down syndrome. Hauv kev hloov pauv Down syndrome, 21 chromosome ntxiv tuaj yeem txuas rau 14 chromosome, lossis rau lwm tus lej chromosome xws li 13, 15, lossis 22.
Yuav ua li cas hloov pauv kev sib raug zoo tshwm sim?
Kev sib hloov pauv tshwm sim vim kev sib pauv ntawm cov khoom siv chromosome ntawm ob lub chromosomes uas tsis yog homosomes. Thaum tus nqi ntawm cov khoom siv caj ces sib npaug, tsis muaj qhov cuam tshuam phenotypic rau tus neeg vim yog qhov sib npaug ntawm cov noob.
Ntau npaum li cas chromosomal translocations?
Chromosomal translocations xa mus rau kev sib pauv ntawm chromosomal ntu ntawm chromosomes. Translocations yog hom feem ntau ntawm cov qauv chromosomal abnormalities pom nyob rau hauv cov pej xeem, muaj ib tug zaus ntawm txog 1/1000 nyob yug.
Yuav ua li cas yog aneuploidy tshwm sim?
Feem ntau Aneuploidies tshwm sim los ntawm Yam hauv Meiosis, Tshwj xeeb hauv Maternal Meiosis I. Rau qee lub sijhawm, cov kws tshawb fawb muajpaub tias feem ntau aneuploidies tshwm sim los ntawm nondisjunction ntawm chromosomes thaum lub sij hawm meiosis.
Pom zoo:
Thaum kev sib hloov pauv hloov pauv tshwm sim li cas?
Inter-generational mobility tshwm sim thaum kev sib raug zoo hloov ntawm ib tiam mus rau lwm tus. Qhov kev hloov pauv tuaj yeem yog nce lossis nqis. Piv txwv li, leej txiv ua hauj lwm hauv lub hoobkas thaum nws tus tub tau txais kev kawm uas tso cai rau nws los ua kws lij choj lossis kws kho mob.
Qhov kev hloov pauv no puas yuav ua rau muaj kev hloov pauv hloov pauv?
Yog li, yog tias muaj kev hloov pauv, piv txwv li, kev ntxig lossis tshem tawm ntawm nucleotide, tshwm sim, qhov no tuaj yeem ua rau kev hloov pauv ntawm kev nyeem ntawv. Nws hloov tag nrho cov amino acid ib ntus. Cov kev hloov pauv no yog hu ua frameshift mutation (tseem hu ua kev nyeem ntawv hloov pauv, nyeem ntawv hloov pauv, lossis framing yuam kev).
Qhov twg yog qhov kev hloov pauv hloov pauv hloov pauv?
Semiconservative replication piav qhia txog cov txheej txheem ntawm DNA replication nyob rau hauv tag nrho cov paub hlwb. DNA replication tshwm sim ntawm ntau lub hauv paus pib ntawm kev rov ua dua raws DNA qauv strand. Raws li DNA ob chav helix yog unwound by helicase, replication tshwm sim nyias ntawm txhua tus qauv strand nyob rau hauv antiparallel cov lus qhia.
Qhov kev hloov pauv twg yog xav tias yuav cuam tshuam los ntawm kev hloov pauv hloov pauv?
Dependent Variable Qhov sib txawv uas nyob ntawm lwm yam uas ntsuas. Cov kev hloov pauv no yuav tsum tau hloov pauv raws li qhov kev sim ua haujlwm ntawm tus kheej hloov pauv lossis hloov pauv. Nws yog cov nyhuv presumed. Qhov kev tshawb fawb hloov pauv twg yog qhov tshwm sim?
Los ntawm kev hloov pauv hloov pauv hloov pauv?
Kev hloov pauv hloov pauv hloov pauv (TMA) yog qhov isothermal (tsis hloov pauv nucleic acid kub), ib leeg-tube nucleic acid amplification system siv ob lub enzymes, RNA polymerase thiab thim rov qab kev sau ntawv. … Cov txheej txheem no tuaj yeem siv los tsom rau RNA thiab DNA.
