Evolution Q: How can populations evolve to form new species?
Think about it - Darwin developed his theory of natural selection without knowing how heredity worked.
Key Questions Include:
How is evolution defined in genetic terms?
What are the sources of genetic variation?
What determines the numbver of phenotypes for a given trait?
How does natural selection affect single-gene and polygenic traits?
What is genetic drift?
What conditions are required to maintain genetic equilibrium?
What types of isolation lead to the formation of new species?
What is a current hypothesis about Galapagos finch speciation?
What are molecular clocks?
Where do new genes come from?
How may Hox genes be involved in evolutionary change?
In 1918, an epidemic began that would go on to kill more than 40 million people. What was this terrible disease? It was a variety of the common "flu" that appears every year. How did it get to be so deadly? And could it happen again? Surprisingly, the answer has everything to do with evolution.