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.
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.
If you can’t remember Biology 107 to save your life, take comfort in the fact that you are not alone. This post will be a quick recap of what happened in Biology 107. I would recommend that you have these concepts straight in your head because they will haunt you in the future.
The University of Alberta offers a Peer Assisted Learning (PAL) seminar that allows Biology 207 students the opportunity to engage with the material presented in class. Attending the seminars can be enormously helpful as it is an interactive way to test the material and skills learned during class.