Explore the critical role of development in evolution through this 46-minute lecture from Yale University's "Principles of Evolution, Ecology and Behavior" course. Discover how development maps genotype to phenotype, creates complexity in multicellular organisms, and preserves ancient patterns across related life forms. Learn about the combinatorial nature of development, allowing diverse expression from limited genetic information. Examine key developmental structures, their evolutionary conservation, and the control mechanisms involved, including transcription factors. Gain insights into how development shapes the diversity of life and its significance in understanding evolutionary processes.