1. Bellringer (Week 3)

2. Bellringer cont.

3. Section 12-2 When Heredity Follows Different Rules

4. Incomplete Dominance The phenotype of the heterozygote is in between the two homozygotes. RR – Red flowers rr – white flowers Rr – pink flowers

5. Codominance Causes the phenotype of both homozygotes to be produced in heterozygous individuals. Ex: Checkered chickens

6. Multiple Alleles Traits controlled by more than two alleles Coat color in rabbits C (dark grey) – dominant to all other alleles C ch (Chinchilla) – dominant to Himalayan and white C h (himalayan) – dominant to white c (white) - recessive

7. Multiple Alleles Continued Blood Type in Humans I A I A or I A i – A I B I B or I B i – B I A I B – AB ii - O

8. Sex-linked Inheritance Traits controlled by genes located on the sex chromosome (X). Ex: Colorblindness and hemophilia