1. Have your clickers ready!

2. Countdown 30 1. The theory of evolution. 2. Discovery of DNA. 3. The first Laws of Heredity. 4. Description of the human genome.

3. Countdown 30 1. They are most common. 2. They cause the recessive trait to go extinct. 3. They show if one dominant allele is inherited.

4. Countdown 30 1. They show trait A. 2. They do not show trait A. 3. Aa. 4. AA. 5. aa.

5. Countdown 30 1. We have two biological parents. 2. DNA replicates before cell division. 3. Every gene has two alleles.

6. Countdown 30 1. They decline in a population over time. 2. They show if two recessive alleles are inherited. 3. They cause disease.

7. Countdown 30 1. 25% 2. 50% 3. 75% 4. 100% 5. Impossible to predict