Video: Hox noob yog dab tsi tshwm sim yog tias Hox noob hloov?
2024 Tus sau: Miles Stephen | [email protected]. Kawg hloov kho: 2023-12-15 23:36
Ib yam li ntawd, kev hloov pauv hauv Hox noob tau ua rau lub cev nqaij daim tawv thiab ceg ceg nyob rau hauv qhov chaw tsis ncaj ncees lawm raws lub cev. Zoo li tus thawj coj ua si, tus Hox noob tsis txhob ua nyob rau hauv kev ua si los yog koom nyob rau hauv limb tsim lawv tus kheej. Cov khoom noj protein ntawm txhua tus Hox noob yog ib qho kev hloov pauv.
Hais txog qhov no, kev hloov pauv hauv Hox noob ua li cas?
Hox noob yog qhib los ntawm ib tug cascade ntawm kev cai noob ; cov proteins encoded thaum ntxov noob tswj kev nthuav qhia tom qab noob . Hox noob muaj nyob rau hauv ntau yam tsiaj, xws li txiv hmab txiv ntoo yoov, nas, thiab tib neeg. Kev hloov pauv hauv tib neeg Hox noob ua tau ua rau caj ces tsis meej pem.
Tsis tas li ntawd, Homeotic thiab Hox noob cuam tshuam li cas? Homeotic noob muaj ib ntu ntawm DNA hu ua homeobox, uas encodes ib ntu ntawm 60 amino acids nyob rau hauv lub homeotic transcription factor protein. Hauv vertebrates, cov no noob feem ntau hu ua HOX noob.
Tsis tas li ntawd, Hox genes lub luag haujlwm rau dab tsi?
Qee qhov "tswj" noob muaj ntau yam kab mob (lawv yog homologous - tau txais los ntawm peb cov poj koob yawm txwv). Piv txwv li, Hox noob pab nteg tawm cov qauv ntawm lub cev ntawm ntau yam tsiaj, nrog rau tib neeg, yoov, thiab kab laum. Lawv teeb tsa lub koom haum taub hau-to-tail.
Vim li cas hox noob Colinear?
Lub koom haum ntawm lub Hox pawg thiab qhov chaw ntawm lub noob nyob rau hauv nws yog li intimately txuas mus rau lub transcriptional kev cai ntawm lub noob . Hox noob Colinearity nyob rau hauv ib co duab los yog daim ntawv zoo li yuav dav, thiab yog li feem ntau xav tias yog vim li cas loj uas lub noob nyob ua ke.
Pom zoo:
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)
Tam sim ntawd yuav siv dab tsi yog tias koj cov khaub ncaws raug hluav taws lossis yog tias muaj tshuaj lom loj tshwm sim ntawm koj cov khaub ncaws?
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