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.
