1. AP Genetics Math

2. Laws of Probability Calculate the probability of tossing three coins simultaneously and obtaining three heads. Express in fraction form.

3. Practice Problem A brown-eyed man with a blue-eyed mother marries a brown-eyed woman with a blue-eyed father. What is the probability that their first child will be brown-eyed? That the second child would be brown-eyed?

4. Chi Square A heterozygous red-eyed female fruit fly was crossed with a red-eyed male fruit fly. The results of the cross are shown below. Eye color is a sex-linked trait on the X-chromosome. Red eyes are dominant to white, determine the chi square value. Round to the nearest hundredth. Phenotype # flies observed Red Eyes134 White Eyes66

5. Chi Square Strategy What are we given? What do we need to figure out? How? Then what?

6. Chi Square Values

7. Chi Square with Christmas MM’s What is the expected? What is the chi squared (x 2 ) ? What is the degrees of freedom? As an MM Scientist, do we accept or reject with 5%?