Chapter 2 Outline

Outline

2.1 Darwin Noted That Vertebrate Embryos Start Off Looking Alike

  • BOX 1.1 A STEP TOO FAR

2.2 Mother Knows Best: Maternal Factors Establish a Basic Polarity of the Body

  • RESEARCHERS AT WORK Two Heads Are Not Better Than One
    • BOX 1.2 MEET DROSOPHILA MELANOGASTER, THE WELL-SEGMENTED ORGANISM

    2.3 A Cascade of Gene Regulatory Proteins Organizes a Body Plan

    2.4 Some Mutations in Drosophila Transform Body Parts Whole

    2.5 Hox Genes Are Crucial for Vertebrate Development, Too

    2.6 Hox Genes Direct “Segmentation” in the Mammalian Brain

    • BOX 1.3 KERFUFFLES IN LANGUAGE: “SEGMENTATION”

    2.7 Hindbrain Rhombomere Fates Are Directed by Homeobox Genes

    2.8 Several Signals Designate the Caudal End of the Body and Nervous System

    2.9 Continued Gradients in BMP Signaling Establish the Dorsal-Ventral Axis in the Nervous System

    • RESEARCHERS AT WORK What Notochord Factor Induces the Floor Plate and Motor Neurons?

    2.10 Find Out Where You Are to Coordinate Your Fate with That of Your Neighbors