Gene Interactions

Genes can and do interact with one another (usually through biochemical pathways). These genes can be on the same chromosome or on different chromosomes. In this post, I will cover three important gene interactions and how they affect the 9:3:3:1.

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The Lac Operon – An Exercise in Systemic Problem Solving

In Escherichia coli, the lac operon allows for the transport and metabolism of lactose. Wild type (WT) E. coli prefers to use glucose as oppose to lactose as its energy source. Therefore, both negative and positive regulation occurs to insure that the lac operon remains tightly regulated and can be induced under appropriate conditions.