1. DNA Lamarck vs. Darwin Activity Darwin’s Journey
Word of the Day:  missile (‘mi sel) (noun) - a weapon capable of being propelled to hit a distant object
A propeller-driven, underwater missile is called a torpedo, and a guided missile powered along a low, level flight path by an air-breathing jet is called a cruise missile.
Pick your favorite animal. Describe what traits that animal has that makes it able to survive in its environment
DNA
Lamarck vs. Darwin Activity
Darwin’s Journey

5. Every living thing is made of cells
CellsTissuesOrgansOrgan Systems
Our cells contain the molecules necessary for our bodies to function

6. In those cells, DNA is held in the nucleus
DNA is like a cookbook that holds the recipes to make proteins
DNA stands for deoxyribose nucleic acid
DNA has a ‘code’ made up of A’s T’s G’s and C’s
This code is what tells our cells to make certain proteins
Those proteins become our ‘traits’

7. Mutations are changes in the DNA
The process of replicating DNA when we need to grow is complicated
Sometimes a problem occurs and the ‘code’ of DNA changes
This change is a mutation

8. Mutations are not always bad
A mutation that causes you to not grow an arm is bad
A mutation that causes you to run really fast is good

9. Lamarck vs. Darwin
Lamarck:
Darwin:

10. Who am I?
Why am I important to science?

11. Charles Darwin
Born in 1809 into a wealthy, well connected, and Christian family
Came from a family of Doctors
Joined a five-year scientific voyage on the HMS beagle
He was 22 when he boarded the ship and began his journey

12. Darwin’s ship, the H.M.S. Beagle

14. The Voyage
The voyage allowed Darwin to spend a lot of time on islands around South America
He spent his days observing the creatures on the island and recording his thoughts

15. The Galapagos Islands

16. Galapagos Tortoise

17. Marine Iguana

18. Blue-Footed Booby

20. How did the finches get so many different types of beaks?
Why did they eat different types of food?
How did their beaks become different?

21. Evolution= genetic change of a population over time

22. More specifically….
Evolution is the change in allele frequencies over time
Review: What is an allele?

23. Does evolution affect individuals?
Does the sequence of your DNA change throughout your life?
Is it possible for evolution to change an individual…..?

24. ……No! Evolution does not act on the individual!
Evolution happens in a population
Evolution does not happen in an individual

25. Darwin’s Four Postulates:
1. In every population there is variety.
(some that is inherited,
some that is not)

26. 2. Some of that variety is passed on to offspring.
He’s got your eyes!

27. 3. There are more individuals born than can survive
Some offspring will die because of disease, predators, and resource availability.

28. (Survival of the Fittest)
4. The individuals that have the most advantageous of traits for a given environment will better survive to reproduce (therefore passing their genes on to offspring). Over time, this will change the genetic frequencies in a population (EVOLUTION!)
(Survival of the Fittest)
Not THIS kind of fit...