# Gene Libraries - $\lambda$ Phage Library: - Chromosome Walking: The use of overlapped regions within genomic libraries to probe and rescreen for overlapping clones - Our impact on our environment is also a component of our phenotype (Ex: termites and how they make their mounds) ![[Pasted image 20240427035311.png|400]] - Oscillation of gene expression is sometimes the driving force behind development of larger components (somites on a zebrafish)