Video: Dab tsi yog peb qhov tseem ceeb siv los nyeem chromosomes?
2024 Tus sau: Miles Stephen | [email protected]. Kawg hloov kho: 2023-12-15 23:36
Cov kws tshawb fawb siv peb tus yam ntxwv tseem ceeb los faib qhov zoo sib xws thiab qhov sib txawv ntawm chromosomes . Cov no peb yam tseem ceeb yog loj, banding qauv thiab centromere txoj hauj lwm. Kuj tseem muaj kev ua haujlwm uas tso cai rau ib tus txheeb xyuas qhov sib txuam chromosomes.
Yog li ntawd, peb tus yam ntxwv uas cov kws tshawb fawb siv los txheeb xyuas cov chromosome yog dab tsi?
Nyob rau hauv ib tug muab hom, chromosomes tuaj yeem yog txheeb xyuas los ntawm lawv tus lej, qhov loj me, txoj haujlwm centromere, thiab cov qauv banding.
Tom qab, lo lus nug yog, dab tsi peb yam tuaj yeem txiav txim siab los ntawm karyotype? Karyotype tsom xam ua tau qhia qhov txawv txav, xws li cov chromosomes uas ploj lawm, ntxiv chromosomes, deletions, duplications, thiab translocations. Cov kev txawv txav no ua tau Ua rau cov kab mob genetic ntshawv siab xws li Down syndrome, turner syndrome, Klinefelter syndrome, thiab fragile X syndrome.
Hauv qhov no, koj yuav txheeb xyuas chromosomes li cas?
Thawj txoj kev siv los txheeb xyuas tag nrho 46 tib neeg chromosomes yog Q-banding (Daim duab 1b), uas yog ua tiav los ntawm staining lub chromosomes nrog quinacrine thiab tshuaj xyuas lawv hauv qab UV teeb. Txoj kev no yog qhov zoo tshaj plaws rau kev tshuaj xyuas chromosomal kev hloov pauv, tshwj xeeb tshaj yog cov uas koom nrog Y chromosome.
Dab tsi ua rau qhov tsaus nti ntawm chromosomes?
Kev tsom xam karyotype feem ntau cuam tshuam nrog kev thaiv cov hlwb hauv mitosis thiab staining cov condensed chromosomes nrog Giemsa zas xim. Ua li cas a dub band ntawm chromosome ? Cov dye stains cheeb tsam ntawm chromosomes uas yog nplua nuj nyob rau hauv lub hauv paus khub Adenine (A) thiab Thymine (T) ua ib tug dub band.
Pom zoo:
Vim li cas qhov tseem ceeb ntawm qhov tseem ceeb?
Thaum koj pom tus nqi kiag li hauv qhov teeb meem lossis qhov sib npaug, nws txhais tau hais tias txhua yam nyob hauv tus nqi tiag tiag yog qhov zoo. Cov txiaj ntsig tsis zoo feem ntau siv rau hauv cov teeb meem cuam tshuam nrog kev nyob deb thiab qee zaum siv nrog qhov tsis sib xws. Qhov ntawd yog qhov tseem ceeb uas yuav tsum nco ntsoov nws zoo li qhov deb ntawm xoom
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