2024 Tus sau: Elizabeth Oswald | [email protected]. Kawg hloov kho: 2024-01-13 00:07
Chromosomal deletions tshwm sim nyob rau hauv ib tug tsawg zaus, los yog induced los ntawm kho cov kab mob hlwb (zoo tshaj, laus los yog maturing oocytes nyob rau hauv cov poj niam, thiab postmeiotic spermatogenic hlwb nyob rau hauv lub txiv neej) nrog chromosome-breaking agents, xws li mob hluav taws xob los yog tej yam tshuaj.
Ntau npaum li cas chromosomal deletions?
22q11 deletion syndrome yog qhov tshwm sim ntau tshaj plaws ntawm tib neeg chromosomal deletion syndrome tshwm sim hauv kwv yees li 1 ntawm 4000-6000 tus menyuam yug nyob[32].
Dab tsi ua rau kev hloov pauv hloov?
Ib deletion mutation tshwm sim thaum ib daim ntawv wrinkle ntawm DNA template strand thiab tom qab ntawd ua rau ib tug nucleotide raug tshem tawm ntawm replicated strand(Daim duab 3). Daim duab 3: Hauv kev hloov pauv hloov pauv, cov ntaub ntawv wrinkle ntawm DNA qauv strand, uas ua rau cov nucleotide raug tshem tawm los ntawm cov kab rov ua dua.
Dab tsi ua rau chromosome poob?
Chromosome abnormalities feem ntau tshwm sim los ntawm ib los yog ntau tshaj ntawm cov no: Yam yuam kev thaum faib cov hlwb sib deev (meiosis) yuam kev thaum faib lwm lub hlwb (mitosis) raug rau cov tshuaj uas ua rau yug tsis xws luag (teratogens)
Puas yog chromosomal deletions tau txais txiaj ntsig?
Txawm hais tias nws muaj peev xwm ua tau los ntawm qee hom chromosomal abnormalities, feem ntau cov kab mob chromosomal (xws li Down syndrome thiab Turner syndrome) yog tsis dhau los ntawm ib tiam mus rau lwm tiam.
Pom zoo:
Puas yog cov dab dab dab dab dab dab dab dab dab dab dab dab?
Myth: Ib tug dab tshos tsis yog neeg ncaj ncees yog tiasnws haum yog. Fact: Tu siab, qhov no yog ib lo lus tsis tseeb uas tau raug perpetuated los ntawm aversive trainers. Txawm hais tias haum rau lub caj dab kom zoo khawb rau hauv cov tawv nqaij rhiab nyob ib ncig ntawm lub caj dab, uas ua rau muaj kev puas tsuaj loj rau cov thyroid, esophagus, thiab trachea.
Yuav ua li cas txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau pom kev pom?
Txawm li cas los xij, corneal collagen cross-linking - cov txheej txheem qib siab tau pom zoo los ntawm US Food and Drug Administration (FDA) hauv xyoo 2016 - tuaj yeem txhim kho qhov pom kev hauv cov neeg mob txhua hnub nyoog. Corneal collagen cross-linking (CXL) tsis yog kho rau keratoconus, tab sis nws tuaj yeem pab tiv thaiv tus mob kom tsis txhob mob hnyav.
Dab tsi yog chromosomal mutations?
Chromosome kev hloov pauv yog hloov pauv uas cuam tshuam rau tag nrho cov chromosomes thiab tag nrho cov noob es tsis yog tsuas yog tus kheej nucleotides. Cov kev hloov pauv no tshwm sim los ntawm kev ua yuam kev hauv kev faib tawm ntawm tes uas ua rau ib ntu ntawm chromosome tawg, muab luam tawm lossis txav mus rau lwm tus chromosome.
Rau ob peb qhov tseem ceeb ntawm kev paub txog chromosomal aberrations yog dab tsi?
Kev tshuaj ntsuam chromosomal yog qhov kev tshawb nrhiav tseem ceeb hauv cov khub niam txiv uas rov nchuav menyuam. Kev ua tus yam ntxwv ntawm qhov sib txawv / cim chromosome qhib kev suav ntawm qhov kev pheej hmoo rov qab muaj tseeb dua hauv kev xeeb tub tom ntej yog li pab txhawb kev sib tham txog caj ces thiab txiav txim siab ntxiv kev yug menyuam .
Dab tsi yog chromosomal abnormalities?
Ib chromosomal anomaly yog a hloov mus rau tus menyuam cov khoom siv caj ces lossis DNA, uas hloov tus menyuam txoj kev loj hlob ua ntej yug. Qhov no tuaj yeem suav nrog cov chromosomes ntxiv, ploj lawm lossis tsis tu ncua. Dab tsi yog qhov tshwm sim ntawm chromosomal abnormalities?
