2. Hair Color What is going on here?

3. Polygenic vs. Multiple Alleles Multiple Alleles: Blood Type Phenotype- A, B, AB, O blood type Alleles I A I B I O ONE gene, with 3 alleles Polygenic: Hair color Many genes affecting one trait MANY PHENOTYPES!

4. Polygenic Inheritance Different genes contributing to the phenotype. #4#12#13

5. How do many genes give so many phenotypes? Flower Color What is going on here? AABBDD Burgundy Polygenic Inheritance Many contributing genes to one trait How many genes? 3 How many phenotypes? 6 Aabbdd Light pink aabbdd White AAbbdd Pink AABbdd Dark pink AABBdd Red AABBDd Dark red Each “capital” is an additive allele adding to the pigment

6. How many genes are involved?

7. Polygenic Traits Quantitative Traits: Phenotypes vary in degree Skin color and hair color Other examples? Height Eye color Weight

8. Polygenic Simulation Questions to keep in mind How do parents pass on genes for height to their children? Is anyone taller than both of their parents? How can the genes contribute to this?

9. Class Data 6’1”5’11”5’9”5’7”5’5”5’3”5’1”

10. Histogram

12. Environment Influenced by the genes and environment Height? Skin color ? Weight?

13. Exit Ticket Americans used to be the “tallest” nation from about 1800-1950. Recently many industrialized European countries are now “Taller” ( Holland is #1). Why do you think? How tall will your child be? Take your height based off the polygenic traits of the simulation and assume the height of your partner. What possible heights could your child be?