1. What are the phenotypes (descriptions) of rabbits that have the following genotypes?
Ggbb: gray hair, red eyes
ggBB: white hair, black eyes
ggbb: white hair, red eyes
GgBb: gray hair, black eyes
2. A male rabbit with the genotype GGbb is crossed with a female rabbit with the genotype ggBb.
Punnett Square Results:
- Row 1 (gB): GgBb, GgBb, GgBb, GgBb
- Row 2 (gB): GgBb, GgBb, GgBb, GgBb
- Row 3 (gb): Ggbb, Ggbb, Ggbb, Ggbb
- Row 4 (gb): Ggbb, Ggbb, Ggbb, Ggbb
How many out of 16 have gray fur and black eyes? 8
How many out of 16 have gray fur and red eyes? 8
How many out of 16 have white fur and black eyes? 0
How many out of 16 have white fur and red eyes? 0
3. A male rabbit with the genotype GgBb is crossed with a female rabbit with the genotype GgBb.
Punnett Square Results:
- Row 1 (GB): GGBB, GGBb, GgBB, GgBb
- Row 2 (Gb): GGBb, GGbb, GgBb, Ggbb
- Row 3 (gB): GgBB, GgBb, ggBB, ggBb
- Row 4 (gb): GgBb, Ggbb, ggBb, ggbb
How many out of 16 have gray fur and black eyes? 9
How many out of 16 have gray fur and red eyes? 3
How many out of 16 have white fur and black eyes? 3
How many out of 16 have white fur and red eyes? 1
Parent Tip: Review the logic above to help your child master the concept of dihybrid cross worksheet with answers.
