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6. Snake fang evolution is characterised by expression of what gene?

  • Sonic hedgehog
  • Hedgehog
  • Engrailled
  • Pax6

7. The rodent expression patterns of the hedgehog gene leads to differences in their tooth morphology

  • False
  • True

8. Which stage of the flatfish's life is an example of recapitulation?

  • Juvenile stage
  • Adult stage

9. Which type of fish changes from a bilaterally symmetrical design in childhood to an asymmetrical design in adulthood

  • Moray eels
  • Flatfish
  • Sharks
  • Ciclids

10. Genes involved in dorso-ventral formation in vertebrates and arthropods are not homologous

  • False
  • True

11. Anticlockwise rotation of micromeres in snail embryo leads to which type of shell?

  • Sinistral
  • Dextral