Video: Dab tsi yog qhov txawv ntawm kev xaiv khoom tsim thiab kev tsim noob caj noob ces?
2024 Tus sau: Miles Stephen | [email protected]. Kawg hloov kho: 2023-12-15 23:36
Artificial xaiv xaiv rau qhov zoo uas twb muaj lawm hauv a hom, hos genetic engineering tsim tej yam tshiab. Hauv kev xaiv dag , cov kws tshawb fawb yug tsuas yog cov tib neeg uas xav tau qhov zoo. Los ntawm kev xaiv yug me nyuam, cov kws tshawb fawb muaj peev xwm hloov tau qhov zoo hauv pej xeem. Evolution tau tshwm sim.
Xav txog qhov no, dab tsi yog qhov downside ntawm kev xaiv khoom tsim raws li daim ntawv ntawm genetic engineering?
Xaiv yug me nyuam (tseem hu ua kev xaiv dag ) yog cov tsoos tshaj plaws daim ntawv ntawm genetic engineering , tab sis nws muaj nws downsides . Cov txheej txheem yog qeeb thiab nyuaj thiab feem ntau ua rau tsis xav tau kev phiv, xws li amplification ntawm deleterious recessive noob.
Dab tsi yog hom kev xaiv dag? Darwin peb Hom ntawm Kev xaiv . Hauv Kev Hloov ntawm Tsiaj thiab Nroj Tsuag Hauv Tebchaws, Darwin (1868) suav tias yog ob hom kev xaiv khoom cuav ntxiv rau ntuj xaiv 1: txheej txheem xaiv thiab tsis nco qab xaiv . Raws li nws tau piav qhia (Darwin 1868, p.
Ib yam li ib tug yuav nug, nws txhais li cas los ua ib qho kev xaiv khoom cuav?
Artificial xaiv yog txhob txwm yug tsiaj los yog tsiaj txhu. Nws txhais tau tias tib yam li kev xaiv yug me nyuam thiab yog ib txoj hauv kev qub ntawm genetic engineering. Kev xaiv yug me nyuam yog ib txoj kev siv thaum yug tsiaj yug tsiaj, xws li dev, nquab lossis nyuj.
Dab tsi yog qhov zoo sib xws thiab qhov sib txawv ntawm kev xaiv yug me nyuam thiab genetic engineering?
Muaj qee yam zoo sib xws , txawm li cas los. Piv txwv li, ob qho tib si genetic engineering thiab Xaiv yug me nyuam tshwm sim hauv kev hloov kho genotype ntawm lub cev. Hauv lwm lo lus, lub cev noob hloov nyob rau hauv ib txoj kev. Yog ib los yog ntau tshaj noob los ntawm lwm hom yog qhia, qhov tshwm sim genome muaj cov DNA recombinant.
Pom zoo:
Dab tsi yog qhov tseem ceeb ntawm cov noob caj noob ces rau kev loj hlob ntawm fetal?
Kev soj ntsuam ntawm lub luag haujlwm ntawm chromosomes hauv tib neeg txoj kev loj hlob thiab kev loj hlob ntawm lub fetus tau mob siab rau qhov txawv txav ntawm chromosomal. Cov noob muaj cov lus qhia rau kev loj hlob thiab kev loj hlob. Qee qhov kev hloov gene ua rau cov gene faulty kom cov lus nyeem tsis raug lossis tsis nyeem tag nrho los ntawm lub xovtooj ntawm tes
Dab tsi yog txhais los ntawm cov noob tseem ceeb thiab cov noob caj noob ces?
(Nyob rau hauv cov ntsiab lus ntawm caj ces, ib qho tseem ceeb tshaj plaws yog ib qho uas yog phenotypically qhia hauv heterozygotes). Ib qho tseem ceeb tshaj plaws yog tawm tsam qhov tsis zoo uas tshwm sim tsuas yog thaum muaj ob daim ntawv theej ntawm cov noob. (Nyob rau hauv cov ntsiab lus genetic, ib tug recessive zoo yog ib tug uas yog phenotypically qhia tsuas yog nyob rau hauv homozygotes)
Dab tsi yog qhov txawv ntawm qhov sib txawv ntawm qhov sib txawv thiab qhov sib txawv ntawm qhov ntab?
Integers thiab floats yog ob yam sib txawv ntawm cov ntaub ntawv tus lej. Ib tus lej (feem ntau hu ua anint) yog tus lej tsis muaj tus lej lej. Float isa floating-point number, uas txhais tau hais tias nws yog tus lej uas muaj tus lej lej. Floats siv thaum xav tau ntau dua
Dab tsi yog qhov txawv ntawm kev xaiv kev taw qhia thiab kev xaiv cuam tshuam?
Hauv kev xaiv cov kev taw qhia, cov pej xeem cov noob caj noob ces hloov mus rau qhov tshiab phenotype thaum raug kev hloov pauv ib puag ncig. Hauv kev sib txawv lossis kev cuam tshuam kev xaiv, qhov nruab nrab lossis nruab nrab phenotypes feem ntau tsis haum dua li qhov phenotype huab cua thiab tsis zoo li yuav ua rau muaj txiaj ntsig zoo hauv cov pej xeem
Yuav ua li cas cov khoom siv caj ces hauv txhua lub xov tooj tshiab tsim los ntawm kev faib tawm ntawm tes sib piv nrog cov khoom siv caj ces hauv lub xov tooj qub?
Mitosis tshwm sim nyob rau hauv ob lub nuclei uas zoo tib yam rau thawj nucleus. Yog li, ob lub hlwb tshiab tsim tom qab kev faib tawm ntawm tes muaj tib yam khoom siv caj ces. Thaum lub sij hawm mitosis, chromosomes condense los ntawm chromatin. Thaum saib nrog lub microscope, chromosomes pom nyob rau hauv lub nucleus