Question

1-

The genotype D_E_ (where the _ indicates that either the dominant or recessive allele is present) results in a wild type phenotype. All other genotypes result in the same mutant phenotype. If the cross DdEe x DdEe is peformed, what is the expected phenotypic ratio?

9:7

13:3

9:3:3:1

12:3:1

9:3:4

9:6:1

15:1

2- The genotypes D_E_, D_ee and ddee all result in a wild type phenotype. ddE_ gives a mutant phenotype. If the cross DdEe x DdEe is peformed, what is the expected phenotypic ratio?

13:3

9:6:1

9:3:4

15:1

12:3:1

9:3:3:1

9:7

3- The genotypes D_E_ and D_ee result in a wild type phenotype. ddE_ gives one mutant phenotype and ddee gives a different mutant phenotype. If the cross DdEe x DdEe is peformed, what is the expected phenotypic ratio?

13:3

9:7

9:3:3:1

9:6:1

15:1

12:3:1

9:3:4

Answer 1