Large population, random mating, no mutation, no selection, no migration.
Remember: Genetics is best learned by , not reading about doing. A PDF full of solved and unsolved problems is one of the most effective low-cost tools for building fluency.
| Cross type | Ratio | Notes | |------------|-------|-------| | Monohybrid (Aa × Aa) | 3:1 | Complete dominance | | Monohybrid testcross (Aa × aa) | 1:1 | – | | Dihybrid (AaBb × AaBb) | 9:3:3:1 | Independent assortment | | Dihybrid testcross (AaBb × aabb) | 1:1:1:1 | Independent assortment | | Dihybrid with recessive epistasis | 9:3:4 | e.g., mice coat color | | Dihybrid with dominant epistasis | 12:3:1 | e.g., squash color | | Dihybrid with duplicate genes | 15:1 | Either dominant gives same trait |
: A structured guide available on Scribd that includes specific examples of sex-linked inheritance and codominance.
Check your work: Does the phenotypic ratio match the expected biological pattern? Conclusion
Large population, random mating, no mutation, no selection, no migration.
Remember: Genetics is best learned by , not reading about doing. A PDF full of solved and unsolved problems is one of the most effective low-cost tools for building fluency.
| Cross type | Ratio | Notes | |------------|-------|-------| | Monohybrid (Aa × Aa) | 3:1 | Complete dominance | | Monohybrid testcross (Aa × aa) | 1:1 | – | | Dihybrid (AaBb × AaBb) | 9:3:3:1 | Independent assortment | | Dihybrid testcross (AaBb × aabb) | 1:1:1:1 | Independent assortment | | Dihybrid with recessive epistasis | 9:3:4 | e.g., mice coat color | | Dihybrid with dominant epistasis | 12:3:1 | e.g., squash color | | Dihybrid with duplicate genes | 15:1 | Either dominant gives same trait |
: A structured guide available on Scribd that includes specific examples of sex-linked inheritance and codominance.
Check your work: Does the phenotypic ratio match the expected biological pattern? Conclusion