early development

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Across
  1. 8. epidermal tissue induced by this signaling molecule family (acronym)
  2. 10. avian egg type
  3. 11. must be inhibited for head to form (acronym)
  4. 12. nuclei and surrounding cytoplasm before cellularization
  5. 13. is the division of cells in the early embryo
  6. 14. membranes separate from the embryo that enable it to survive in the egg or uterus
  7. 16. extracellular matrix forming a fibrous mat around egg (2 words)
  8. 18. point where cell division slows and embryo genes are expressed (acronym)
  9. 20. process that forms embryonic germ layers
  10. 21. formed is termed the archenteron
  11. 22. transcription factor central to development, often activated by Wnt pathway
  12. 23. receptor for gurken
  13. 26. initiate Xenopus blastopore involution (2 words)
  14. 29. site where amphibian gastrulation starts (2 words)
  15. 32. nucleus of a sperm or an egg cell
  16. 33. juxtacrine signaling protein for specification of veg2 cells
  17. 35. contains enzymes that digest jelly layer
  18. 36. production of a blastocoel in mammalian morula
  19. 37. protein that dorsalizes Drosophila embyro
  20. 38. type of cleavage in mammals
  21. 39. protein that localizes β-catenin to future dorsal surface
Down
  1. 1. major structural characteristic of amniote gastrulation (2 words)
  2. 2. mesenchyme forms larval skeleton on sea urchins
  3. 3. balancing organs, modified wings
  4. 4. cells that will form the notochord
  5. 5. multinucleate cell produced by mitosis without cytokinesis
  6. 6. embryo forms only from this layer of cells
  7. 7. physiological changes necessary for mammalian sperm to undergo acrosomal reaction
  8. 9. fusion of sperm and egg
  9. 15. blastomeres form a compact ball of cells
  10. 17. vegetal cells destined to form endoderm or mesoderm
  11. 19. cleavage-stage cells
  12. 24. a narrow tunnel in the eggshell for fertilization
  13. 25. maternal effect gene expressed in anterior of embryo
  14. 27. plays an essential role in patterning the vertebrate embryo
  15. 28. cells form hollow sphere surrounding a central cavity
  16. 30. movement toward gradient of increasing or decreasing concentration of a particular substance
  17. 31. gene complex in Drosophila that specifies the segmental identity of abdominal segments
  18. 34. cortical granule protein forms a coating around the egg
  19. 40. second messenger involved in Ca+ release that initates acrosomal reaction