1. Incomplete and Codominance
Inheritance without clear dominant and recessive alleles

2. Incomplete Dominance
Traits where the two alleles are neither dominant or recessive
Neither allele is always expressed when present
Neither allele is completely covered up by the presence of a different allele

3. These are both homozygous for Red

4. Predict the Offspring

5. Results of Red x Red All of the offspring are red
All of the offspring are homozygous

6. These are both Homozygous White

7. Predict the Offspring

8. Results of White x White
All of the offspring are white
All of the offspring are homozygous

9. Homozygous Red x Homozygous White

10. Predict the Offspring

11. Results of Red x White All of the offspring are Pink
All of the offspring are Heterozygous
Red and White are “incompletely dominant”

12. Predict the Offspring

13. Predict the Offspring

14. Red and White Cattle

15. Roan Cattle Roan Cattle have a mix of Red and White fur
Red and White are actually both dominant (“codominant”)
Both the red and the white alleles will be expressed when present

16. Predict the offspring

17. Predict the Offspring

18. Predict the Offspring

19. Predict the Offspring

20. Predict the Offspring

21. Predict the offspring