1. Inquiry 10.21 and 22 No Warm-Up Today! Take out your quiz review assignment for check-off.

2. Learning Targets

3. Quiz Review Self-Check Check your work with my answer key Make changes Ask questions

4. Evidence for Evolution Body Structures, Embryos, DNA/RNA Comparisons

5. Last Time…. Evidence for Evolution ▫Body structures (homologous, vestigial) ▫Fossil record ▫Relative and radiometric dating ▫Comparative embryology ▫DNA comparisons

6. DNA/RNA Comparisons Genetic similarities between organisms help scientists determine correct evolutionary trees ▫How closely related organisms are ▫Who evolved from who, even when physical similarities aren’t obvious Am. Vulture Afr. Vulture Stork

7. Types of Evidence from DNA/RNA Highly related organisms share a high percentage of DNA in common ▫Humans and chimps share 96% of DNA in common ▫About 40 million differences in 3 billion letters ▫Only 2,000 of these differences code for something (Emory University, 2005)

8. Types of Evidence from DNA/RNA Seemingly unrelated organisms share genes that code for the same proteins ▫Humans and yeast both have the gene that produces the protein myosin ▫Myosin is used in human muscle tissue ▫Myosin in yeast helps organelles move

9. “Molecular Clocks” The number of mutations found in DNA can help us estimate the length of time between the evolution of two organisms ▫Mutations accumulate at a constant rate ▫The more differences between two organisms, the longer apart they evolved from each other

10. Human/Chimp Chromosome Activity Read Background and Answer a, b, c (p. 1) Do Chromosome Analysis #1-9 (p. 1, 2) Comparison of Human/Chimp Chromosomes: Do 1, 2 and Answer 3 a-g 3 a-g should be done on the back!

11. Next Time… HOW does evolution happen? HW: Finish human/chimp chromosome activity