Download presentation
Presentation is loading. Please wait.
1
Dihybrid crosses
2
Mendel’s Law of Independent Assortment
Mendelian Genetics 4/9/2019 Mendel’s Law of Independent Assortment Alleles for different traits are distributed to sex cells (& offspring) independently of one another. This law can be illustrated using dihybrid crosses (breeding experiment that tracks the inheritance of two traits) copyright cmassengale
3
Dihybrid Cross RrYy x RrYy Traits: Seed shape & Seed color
Mendelian Genetics 4/9/2019 Dihybrid Cross Traits: Seed shape & Seed color Alleles: R round r wrinkled Y yellow y green RrYy x RrYy RY Ry rY ry RY Ry rY ry The key is to figure out the possible allele combinations for each parent!
4
Dihybrid Cross RY Ry rY ry RY Ry rY ry Mendelian Genetics 4/9/2019
copyright cmassengale
5
Dihybrid Cross RY Ry rY ry Round/Yellow: 9 Round/green: 3
Mendelian Genetics 4/9/2019 Dihybrid Cross RY Ry rY ry Round/Yellow: 9 Round/green: 3 wrinkled/Yellow: 3 wrinkled/green: 1 9:3:3:1 phenotypic ratio RRYY RRYy RrYY RrYy RRyy Rryy rrYY rrYy rryy copyright cmassengale
6
Mendelian Genetics 4/9/2019 Dihybrid Cross Round/Yellow: 9 Round/green: 3 wrinkled/Yellow: 3 wrinkled/green: 1 9:3:3:1 copyright cmassengale
7
NOW…. Practice on your own
NOW…. Practice on your own! Your goal: phenotypic ratios for each dihybrid cross!
Similar presentations
© 2025 SlidePlayer.com. Inc.
All rights reserved.