1. Complex Patterns of Inheritance
Beyond Mendel’s rules of simple dominant/recessive inheritance

2. Incomplete Dominance
Neither allele is dominant; ______________ is a _________ of phenotypes of the two homozygotes.
_______+_______ = _________

3. Genotype = ___; phenotype = ___________

4. Genotype = ______; phenotype = ________

5. Genotype = ______; phenotype = ________

6. __ __ __ ____ ____ __ ____ ____ P = RR x WW
Practice incomplete dominance with Four O’Clocks (flowers)
P = RR x WW
Red parent plant __ __ __
____
____
White parent plant __
____
____
Genotype of F1 =
100% ______
Phenotype of F1 =
All _________

7. ___ ___ ___ _____ _____ ___ _____ _____ F1 = RW x RW Pink parent plant
Genotype ratio of F2 =
________________________
Phenotype ratio of F2 =
________________________

8. Codominance _______ alleles are ___________; expressed separately __
Red + White =
__________________________________ __ __ __ __ __ __ __ __ __

9. Genotype = ____; phenotype = _____

10. Genotype = ____; phenotype = _______

11. Genotype = ____; phenotype = ______

12. Show the cross between two roan cows (use R and W).
What is the probability that two roan cows will have at least one roan offspring?
What is the probability that two roan cows will have a white offspring? __
___
____
____
___
___
___
____

13. Multiple Alleles More than ___ ___________ possible for a trait
Example: Blood type in humans
Three alleles possible (___, ___, and ____), each person only has two of those alleles
Four phenotypes (blood types) possible: ___, ___, ___, and ___
__ and __ are codominant; ____ is recessive
Alleles notated as ___, ____, ___

14. Notice the new allele notation!
Type AB: IAIB Type O: ii
Type A: IAIA or IAi Type B: IBIB or IBi
Notice the new allele notation!

15. Polygenic Traits
Trait is controlled by interaction between ___________________
Examples: skin color, eye color, height, hair color
Results in a continuum of expressed phenotypes