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| Modern Genetic Analysis Chapter 16. The Genetic Basis of Development Additional Aspects of Pattern Formation Figure 16-30. Different developmental decisions are made by using mixed and matched combinations of pathway components. Each colored arrow represents a different component. These pathways are joined together in different combinations to achieve different developmental decisions in different cell lineages or in the same cell lineage at different developmental stages. Some components of these decision processes are common; others are unique to each decision process. It is also possible that some components (denoted by an asterisk) are used in multiple decision processes but occupy different positions in the two processes.

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