báo cáo nghiên cứu Amphibian embryology

Welcome to group 4:           ! " # $ %& '  ()* Amphibian embryology Brief Content  +, +/+. 01+2 1 01+3+24-+5  )6+..22 1. Early Amphibian Development  • 7.8+-+9+ 2 .4)+-+9-1-+25) • %.2 )4+- :;<.=249/21.2+44.+ +-0 +92->-.?4.929>44./..4+-. @.5-A.9. *4+.  :2 - 3 hours): - +44..4) 24+.B4.49) +/+.)).9A4+ +9C24+1/.4..8+4+-0+. DE+9F..).-+..22G4.1-+24 ..2: ) ..2+9 +) ..2; - +44.2?4 ) 24+.B4.) +/+.G>2+.) 0 4.9+94. +) ..2+.G 2.0++4.9 ) ..2H +) ..2:+144.2A.+9)-; DE! "!:2 hours)< I+44+ 244.=24. I-+..22+9)-GGG .91-+24 ..2)+9F. I4+->+2) 0 4.:4..)).4+5G-J+44./..4+-0 ; "#$(3-7 hours): 4.1.) .2+00+.4B+94.. 12)29..9+! 1-+24) => It prevents the cells beneath it from interacting prematurely with the cells above it => It permits cell migration during gastrulation %$&  04.1-+24 ..24.4. *00-.94.)4.)40-+2 '%$& b. Amphibian Gastrulation !(10 hours): - .1-+240.1.) .2/21  - .) 2+44.2G+).G4.92+-29. /.29.:/++4.;+44.92+- 1-+240.-0 (!)*!:12 hours; I0).22G/-5+9.01- ⇒ 4.))-+1-+240.2G .9 − +44..9420.2) 0 4 = 9>4+9.2. +22G-J) ) 2 DE4.-J0- [...]... of the most anterior head structures promotes the formation of the cement gland, eyes, and olfactory (nasal) placodes Frzb and Dickkopf References http://www.vcbio.science.ru.nl/en/virtuallessons /embryology /amphibian/ Developmental Biology - ninth edition-SCOTTF.GILBERT http://worms.zoology.wisc.edu/frogs/gastxen/BC_summary.html Giáo án sinh học phát triển- TS Nguyễn Lai Thành ... 7 hours) The rudimentary eyes are clearly distinguishable Furthermore, the place of the stomoderm (presumptive mouth) and the first external shape of the gills and tail are visible 2 Axis Formation in Amphibians gray crescent: • • equally into the two blastomeres only the blastomere containing the gray crescent develops normally Fibronectin and the Pathways for Mesodermal Migration • before gastrulation, . :0.2 05/.  4 ;+9 4 .= 24 . ?4. +-2+0.G 4 . 2+9 4+ -+. /21 - • .8+  4 4 . 4& gt;1-+ 24 ..2 • - 4 .1-+ 24 ..) 4+  4 .+).2). 4 9./ 02. G)5.9 4 19+1 4 G.-+5 2 ! 2.) .4. 90 4.  4 +4 +)) 0-2.2 4 .9)5G 4 .  24 + 4. .+9 24  )4 .2 0 4. 2 4 .G +5G 4 .). . 4 -+9B..2B+9-G+ )4 :+2+-;0-+)9.2 3&**. References P0<QQ>>>/)12).).-Q.Q/ 4 +.   &%.0&0 • 1.G.+ 24 -+5B 4 .0.2 05/.. )4 9. G 4 .1-+ 24 ) G 2.) .4. 2+. ?4 +) -+ +4 ? 4 +4 ) 4+ 2=1-2G=1.)5 • ./-5 .29. +00.+2 4 4 +/ +- 4 .2.=1.)5=1.2 • M)+ 4 +9)I>J.2C. )4. 9-+.+