1. Polygenic/ Dihybrid Crosses

2. F. Polygenic Inheritance Traits in which the phenotypes are determined by many genes contributing to the overall phenotype. Each gene is on a different location on the chromosome and may not even be on the same chromosome. The best way to recognize polygenic inheritance is when the phenotypes exhibit a wide range of expression or variation. Examples: skin color, hair color, height.

3. g. Dihybrid Crosses HEHehEhe HE He hE he

4. g. Dihybrid Crosses HEHehEhe HEHHEE He hE he

5. g. Dihybrid Crosses HEHehEhe HEHHEEHHEe He hE he

6. g. Dihybrid Crosses HEHehEhe HEHHEEHHEeHhEE He hE he

7. g. Dihybrid Crosses HEHehEhe HEHHEEHHEeHhEEHhEe He hE he

8. g. Dihybrid Crosses HEHehEhe HEHHEEHHEeHhEEHhEe HeHHEe hE he

9. g. Dihybrid Crosses HEHehEhe HEHHEEHHEeHhEEHhEe HeHHEeHHee hE he

10. g. Dihybrid Crosses HEHehEhe HEHHEEHHEeHhEEHhEe HeHHEeHHeeHhEe hE he

11. g. Dihybrid Crosses HEHehEhe HEHHEEHHEeHhEEHhEe HeHHEeHHeeHhEeHhee hE he

12. g. Dihybrid Crosses HEHehEhe HEHHEEHHEeHhEEHhEe HeHHEeHHeeHhEeHhee hEHhEE he

13. g. Dihybrid Crosses HEHehEhe HEHHEEHHEeHhEEHhEe HeHHEeHHeeHhEeHhee hEHhEEHhEe he

14. g. Dihybrid Crosses HEHehEhe HEHHEEHHEeHhEEHhEe HeHHEeHHeeHhEeHhee hEHhEEHhEehhEE he

15. g. Dihybrid Crosses HEHehEhe HEHHEEHHEeHhEEHhEe HeHHEeHHeeHhEeHhee hEHhEEHhEehhEEhhEe he

16. g. Dihybrid Crosses HEHehEhe HEHHEEHHEeHhEEHhEe HeHHEeHHeeHhEeHhee hEHhEEHhEehhEEhhEe heHhEe

17. g. Dihybrid Crosses HEHehEhe HEHHEEHHEeHhEEHhEe HeHHEeHHeeHhEeHhee hEHhEEHhEehhEEhhEe heHhEeHhee

18. g. Dihybrid Crosses HEHehEhe HEHHEEHHEeHhEEHhEe HeHHEeHHeeHhEeHhee hEHhEEHhEehhEEhhEe heHhEeHheehhEe

19. g. Dihybrid Crosses HEHehEhe HEHHEEHHEeHhEEHhEe HeHHEeHHeeHhEeHhee hEHhEEHhEehhEEhhEe heHhEeHheehhEehhee

20. How many offspring have….. 1.Dark hair and brown eyes? HxEx? 2.Dark hair and blue eyes? Hxee? 3.Red hair and brown eyes? hhEx? 4.Red hair and blue eyes? hhee?

21. How many offspring have….. 1.Dark hair and brown eyes? HxEx? nine 2.Dark hair and blue eyes? Hxex? 3.Red hair and brown eyes? hxEx? 4.Red hair and blue eyes? Hxex?

22. How many offspring have….. 1.Dark hair and brown eyes? HxEx? nine 2.Dark hair and blue eyes? Hxex? three 3.Red hair and brown eyes? hxEx? 4.Red hair and blue eyes? Hxex?

23. How many offspring have….. 1.Dark hair and brown eyes? HxEx? nine 2.Dark hair and blue eyes? Hxex? three 3.Red hair and brown eyes? hxEx? three 4.Red hair and blue eyes? Hxex?

24. How many offspring have….. 1.Dark hair and brown eyes? HxEx? nine 2.Dark hair and blue eyes? Hxex? three 3.Red hair and brown eyes? hxEx? three 4.Red hair and blue eyes? Hxex? one