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Polygenic/ Dihybrid Crosses

Polygenic/ Dihybrid Crosses. F. Polygenic Inheritance.

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Polygenic/ Dihybrid Crosses

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  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

  4. g. Dihybrid Crosses

  5. g. Dihybrid Crosses

  6. g. Dihybrid Crosses

  7. g. Dihybrid Crosses

  8. g. Dihybrid Crosses

  9. g. Dihybrid Crosses

  10. g. Dihybrid Crosses

  11. g. Dihybrid Crosses

  12. g. Dihybrid Crosses

  13. g. Dihybrid Crosses

  14. g. Dihybrid Crosses

  15. g. Dihybrid Crosses

  16. g. Dihybrid Crosses

  17. g. Dihybrid Crosses

  18. g. Dihybrid Crosses

  19. g. Dihybrid Crosses

  20. How many offspring have….. • Dark hair and brown eyes? HxEx? • Dark hair and blue eyes? Hxee? • Red hair and brown eyes? hhEx? • Red hair and blue eyes? hhee?

  21. How many offspring have….. • Dark hair and brown eyes? HxEx? nine • Dark hair and blue eyes? Hxex? • Red hair and brown eyes? hxEx? • Red hair and blue eyes? Hxex?

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

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

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

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