Video: Cov txheej txheem cloning yog dab tsi?
2024 Tus sau: Miles Stephen | [email protected]. Kawg hloov kho: 2023-12-15 23:36
Cloning hais txog cov txheej txheem ntawm kev tsim lub embryo nrog DNA los ntawm tus tsiaj laus. Lub embryo tsim tshiab yog ces zapped nrog hluav taws xob kom nws pib multiply, kom txog rau thaum nws dhau los ua blastocyst (ib pawg me me ntawm cov hlwb uas tsim tom qab lub qe yog fertilized), uas yog ces cog rau hauv ib tug surrogate niam.
Ib yam li ntawd, cloning ua li cas?
Hauv kev yug me nyuam cloning , cov kws tshawb fawb tshem tawm cov laus somatic cell, xws li cov tawv nqaij ntawm tes, los ntawm cov tsiaj uas lawv xav luam tawm. Tom qab ntawd lawv hloov DNA ntawm tus neeg pub tsiaj lub cev somatic rau hauv lub qe qe, los yog oocyte, uas tau muaj nws tus kheej DNA-muaj nucleus tshem tawm.
Qhov thib ob, dab tsi yog siv los tsim ib lub clone? Cov txheej txheem. Kev yug me nyuam cloning feem ntau siv "somatic cell nuclear hloov chaw" (SCNT) rau tsim cov tsiaj uas muaj genetic zoo tib yam.
Tsis tas li ntawd, cloning siv rau dab tsi?
Cloning Siv. Kev kho mob cloning yog tus txheej txheem uas tus neeg lub DNA yog siv rau loj hlob embryonic clone . Txawm li cas los xij, es tsis txhob tso lub embryo no rau hauv niam txiv, nws cov hlwb yog siv rau loj hlob qia hlwb.
Qhov kev vam meej ntawm cloning yog dab tsi?
Txog rau hnub no, SCNT kev ua tau zoo-uas yog, feem pua ntawm kev hloov pauv nuclear nws yuav siv sij hawm tsim cov tsiaj nyob-tseem nyob ib puag ncig 1 txog 2 feem pua hauv nas, 5 mus rau 20 feem pua hauv nyuj thiab 1 mus rau 5 feem pua ntawm lwm hom. Los ntawm kev sib piv, lub kev vam meej Nyob rau hauv cov nas nyob rau hauv vitro fertilization (IVF) yog nyob ib ncig ntawm 50 feem pua.
Pom zoo:
Dab tsi yog cov txheej txheem uas tsim cov ntawv luam tshiab ntawm cov kab mob caj ces?
Cov txheej txheem ntawm DNA replication tsim ib daim qauv tshiab ntawm cov kab mob cov ntaub ntawv caj ces kom dhau mus rau lub cell tshiab. Dawb ntab nucleotides yog txuam nrog lawv cov lus qhuas los ntawm ib qho enzyme hu ua polymerase. Cov no yog 'lub tsev.' Lawv sib sau ua ke DNA tshiab strand nrog txhua tus qub strands
Cov xim dab tsi yog cov hlwb feem ntau ua ntej siv thawj cov xim rau cov txheej txheem Gram stain?
Ua ntej, siv lead ua violet, thawj stain, yog siv rau lub tshav kub-tso smear, muab tag nrho cov hlwb xim liab
Dab tsi yog txheej txheem spontaneous thiab non-spontaneous txheej txheem?
Cov txheej txheem spontaneous yog ib qho uas tshwm sim yam tsis muaj kev cuam tshuam ntawm sab nraud. Ib txoj kev uas tsis yog tshwm sim yuav tsis tshwm sim yog tias tsis muaj kev cuam tshuam ntawm sab nraud
Dab tsi yog lub zog tso tawm cov txheej txheem uas rhuav tshem cov molecules loj rau hauv cov me?
Catabolic Reactions. Cov tshuaj tiv thaiv Catabolic rhuav tshem cov organic molecules loj rau hauv cov molecules me, tso tawm lub zog uas muaj nyob rau hauv cov tshuaj bonds
Cov txheej txheem twg yog txheej txheem endothermic?
Cov txheej txheem endothermic yog ib qho txheej txheem uas xav tau lossis nqus lub zog los ntawm nws qhov chaw nyob ib puag ncig, feem ntau yog ua kom sov. Nws yuav yog cov txheej txheem tshuaj, xws li dissolving ammonium nitrate hauv dej, lossis cov txheej txheem ntawm lub cev, xws li melting ntawm cov dej khov nab kuab