Qhov sib txawv tseem ceeb ntawm kev sib hloov thiab kev hloov pauv tsis yog kev hloov pauv yog kev hloov pauv hloov pauv hloov pauv yog qhov sib pauv ntawm cov DNA tawg ntawm ob lub chromosomes nonhomologous, thaum kev hloov pauv tsis sib xws yog kev hloov pauv ntawm chromosome ntu ntawm ib chromosome mus rau lwm qhov tsis yog homologous chromosome.
Kev hloov chaw yog hom chromosomal rearrangement. Qhov kev npaj no tuaj yeem yog intrachromosomal (hauv tib lub chromosome) lossis interchromosomal (nruab nrab ntawm ob chromosomes). Nonhomologous chromosomes pauv lawv cov chromosome ntu nquag. Tsis tas li ntawd, nws tsim ob lub chromosomes uas txawv ntawm caj ces ntawm cov chromosomes. Reciprocal translocation thiab nonreciprocal translocations yog ob hom kev hloov pauv loj. Reciprocal translocation yog kev sib pauv ntawm cov chromosomal tawg ntawm ob lub chromosomes nonhomologous thaum nonreciprocal translocation yog ib hom kev hloov pauv uas cov khoom siv caj ces hloov ntawm ib chromosome mus rau nonhomologous chromosome.
Kev hloov pauv hloov pauv yog dab tsi?
Kev hloov pauv hloov pauv yog hais txog kev sib pauv ntawm chromosome ntu ntawm cov chromosomes nonhomologous. Nyob rau hauv reciprocal translocation, tawg ntu ntawm chromosomes pauv ntawm ob chromosomes uas tsis koom nrog homologous khub. Piv txwv li, ib qho kev hloov pauv sib txawv yuav tshwm sim ntawm chromosomes 1 thiab 19, uas tsis yog homologous rau ib leeg. Txawm li cas los xij, ob lub chromosomes translocated pib thaum kawg ntawm kev sib hloov pauv. Tsis tas li ntawd, qhov chaw ntawm centromere thiab qhov ntau thiab tsawg ntawm chromosomes yuav txawv heev vim muaj kev sib hloov pauv.
Daim duab 01: Kev hloov pauv hloov pauv hloov pauv
Nyob rau hauv kev sib npaug sib npaug, tsis muaj qhov pom tseeb ntawm cov khoom siv caj ces. Yog li ntawd, kev sib txuas lus sib txuas tsis yog ib txwm ua rau muaj kab mob. Txawm li cas los xij, nws yuav ua rau muaj teeb meem tsis muaj menyuam thiab nchuav menyuam.
Kev hloov pauv tsis sib haum yog dab tsi?
Nonreciprocal translocation yog kev hloov ntawm chromosome ntu los ntawm ib chromosome mus rau ib qho sib txawv nonhomologous chromosome. Thaum ib ntu chromosome cais los ntawm thawj chromosome, nws poob cov khoom siv caj ces. Ntawm qhov tod tes, lwm tus chromosome tau txais ntu chromosome uas muaj cov khoom siv caj ces ntxiv. Vim tau txais ib ntu chromosome, nws ua ntev dua li qhov loj me. Cov chromosome uas tau pauv cov chromosome ntu yuav luv dua.
Daim duab 02: Chromosomal Aberrations
Tsis tas li ntawd, qhov tseem ceeb ntawm kev hloov pauv tsis sib xws yog tias tsis muaj kev sib pauv ntawm cov khoom siv caj ces ntawm ob chromosomes. Nws yog ib txoj hauv kev hloov cov chromosome ntu.
Dab tsi yog qhov zoo sib xws ntawm Kev Sib Koom Tes thiab Kev Hloov Tsis Ncaj Ncees?
- Kev sib hloov thiab tsis sib haum yog ob hom kev hloov pauv tseem ceeb.
- Ob hom yog chromosomal rearrangements.
- Ntxiv mus, lawv ua rau kev hloov pauv hauv cov qauv chromosome.
Dab tsi yog qhov sib txawv ntawm Kev Sib Koom Tes thiab Kev Hloov Tsis Ncaj Ncees?
Kev hloov pauv hloov pauv tshwm sim tshwm sim thaum ob lub chromosomes nonhomologous pauv lawv cov khoom siv caj ces ntawm ib leeg; nws yog hom kev hloov pauv ntau tshaj plaws. Tsis yog-kev sib txuas lus, ntawm qhov tod tes, yog ib txoj kev hloov ntawm chromosomal ntu los ntawm ib chromosome mus rau lwm qhov nonhomologous chromosome. Yog li, qhov no yog qhov sib txawv tseem ceeb ntawm kev hloov pauv tsis sib xws thiab tsis sib haum.
Hauv qab infographic muab cov lus piav qhia ntxiv ntawm qhov sib txawv ntawm kev sib txuas lus thiab kev hloov pauv tsis sib xws.
Summary – Reciprocal vs Nonreciprocal Translocation
Nyob rau hauv cov ntsiab lus, kev hloov pauv sib txawv thiab kev hloov pauv tsis sib xws yog ob hom kev hloov pauv tseem ceeb. Thaum lub sij hawm translocation reciprocal, ob lub chromosomes nonhomologous pauv lawv chromosomal ntu nrog ib leeg. Nyob rau hauv sib piv, ib chromosome hloov nws ntu tawg mus rau ib tug nonhomologous chromosome nyob rau hauv nonreciprocal translocation. Yog li, qhov no yog qhov sib txawv tseem ceeb ntawm kev hloov pauv tsis sib xws thiab tsis sib haum.
