Introduction

How is an embryo patterned what determines where is

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Unformatted text preview: bryo patterned? What determines where is front and back, top and bottom? How do some cells know to stick together, others migrate to certain places, others become skin, or feather or bone? How could you prove that all cells have the same genetic information? What modern technique is this experiment demonstrating? 01_03 Developmental Biology How does a single-celled egg develop into a complex multi-celled organism? How do different cell types arise if each cell starts out with the same genetic material? How is an embryo patterned? What determines where is front and back, top and bottom? Differential Gene Expression How do some cells know to stick together, others migrate to certain places, others become skin, or feather or bone? What does “gene expression” mean? How do genes get differentially expressed? Cell Specification Just B4.1 cell progeny Complete larva stained for acetylcholinesterase Rest of the early cells Cell Specification Autonomous Specification How do cells “know” what cell type to make? Inherited information (contained in cytoplasm of dividing cells) Cell Specification Conditional Specification How do cells “know” what cell type to make? Cell-cell...
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