New version page

Virginia Tech BCHM 4116 - Genome, Diversity and Evolution

This preview shows page 1 out of 2 pages.

View Full Document
View Full Document

End of preview. Want to read all 2 pages?

Upload your study docs or become a GradeBuddy member to access this document.

View Full Document
Unformatted text preview:

BCHM 4116 1st Edition Lecture 5 Outline of Last Lecture I. The Secondary and Tertiary Structures of RNAII. tRNAIII. Physical structure of genes in eukaryotesIV. Genome size correlates with biological complexity? Outline of Current Lecture II. Genome size vs complexity III. DiversityIV. Evolution Current LectureGenome size vs complexityThings that affect genome size, without affecting complexity of organism1. No change in gene count, but change in repetitive sequencea. Major cause of size of genome variation, without affecting complexity 2. Segmental duplicationa. A whole chunk of chromosome duplicates itself, either locally or else where3. In plants, polyploidy occursa. Can have 4n or 8n or more counts DiversityWays to lend yourself some flexibility without changing gene number:Majority of sequences don’t do anything for the organism, besides repeat themselves. Genome size variation is a phenomenon that’s observed, but doesn’t have to do anything with biological complexity. Gene number: 20,000 in humansHow many states can this particular organism or cell take in response to the environment. One gene has two possible states: on or offThese notes represent a detailed interpretation of the professor’s lecture. GradeBuddy is best used as a supplement to your own notes, not as a substitute.500 genes have 2500 possible states. Each gene can be on or off. The difference in 1000 genes between humans and worms, is actually a lot of difference because its 21000 is a huge difference already. Genes can be tweaked through post translation modification. One gene can give you lots of different RNA or proteins due to gene splicing. Affords you the possibility of flexibility. Cell-cell interaction, and interaction with environment are controlled by regulation. We have genes not only to keep us alive, but to regulate our gene expression based on response to the environment. Greater your regularity power, the greater complexity that you could have. EvolutionThe better you are at regulation/response to environment the better chance you have to survive. When talking about biological complexity, it doesn’t mean that a simpler organism is worse than us. What matters is how you survive in your environment; whether you are adapted to the environment you’re you. Complexity is good, but it not the ultimate goal of evolution; thegoal is to survive in whatever environment you’re


View Full Document
Loading Unlocking...
Login

Join to view Genome, Diversity and Evolution and access 3M+ class-specific study document.

or
We will never post anything without your permission.
Don't have an account?
Sign Up

Join to view Genome, Diversity and Evolution and access 3M+ class-specific study document.

or

By creating an account you agree to our Privacy Policy and Terms Of Use

Already a member?