I have the data for corn color and texture. These are the followup questions for the data.
Color of Corn Grains
Number of Purple (Red) Grains: 75
Number of Yellow (White) Grains: 30
Ratio of Purple (Red) Grains: Yellow (White) Grains: 2.5:1
Probable Genotypes of Parents:Â Â
Texture of Corn Grains
Number of Smooth Grains: 85
Number of Wrinkled Grains: 20
Ratio of Smooth Grains: Wrinkled Grains: 4.25:1
Probable Genotypes of Parents:
Grain color is one trait. Grain texture is a secondtrait. For each, what do you notice about the phenotypicratios?
R = Purple/Red; r = Yellow/White; S = Smooth; s = Wrinkled
A genetic cross with only one trait is a monohybrid cross.
A genetic cross involving two traits is called a dihybridcross.
Consider the cross: RRSS x rrss (Parental Generation) F1 is theresult of the cross. (Gametes: RS for one parent (e.g. the egg) andrs for another parent (e.g. the sperm). FOR EACH GAMETE, IT IS ONEALLELE FOR EACH TRAIT. THIS IS WHY YOU SEE TWO LETTERS PERGAMETE.)
What is the expected genotype for the F1generation?
Will all F1 offspring have the samegenotype?
Will all F1 offspring have the samephenotype?
What are the predicted phenotypes for the F2 generationcrossing RrSs x RrSs?
In what ratios will they occur?
Purple/Red, Smooth:
Purple/Red, Wrinkled:
Yellow/White, Smooth:
Yellow/White, Wrinkled:
