BIOL 3445 Lecture Notes - Lecture 16: Snake Venom, Horizontal Gene Transfer, Microorganism
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Exam #2: practice quiz is up on canvas, practice questions going up soon, thursday, 03/15/2018 @ 3:30pm. Final exam: not cumulative but do know the whole semester (it all builds, same length and complexity as other exams, tuesday, 05/08/2018 @ 11:00am 1:00pm. Complex adaptations are controlled by networks of cascading genes. Explain why complex traits pose a unique problem for the study of evolution. Complex adaptations: suites of traits that are selected together for a common function: these are traits that have multiple, complicated parts in order to function correctly, ex. The venom delivery system in snakes, bower birds mating nest. Controlled by a regulatory network of genes: genes that code for proteins that directly produce the trait, regulatory genes that interact with the environment and regulate the expression of protein-coding genes. Regulatory networks produce a cascade of gene expression: an environmental signal triggers transcription factors, transcription factors trigger more regulatory genes.
