Question

For each offspring genotype in the Punnett square you just completed, determine the phenotype. In other words, what is the predicted fur color and eye color of the offspring? Using your Punnett square from the last step, fill in the predicted fraction for each phenotype in the data table below.

Black Fur and Black Eyes Black Fur and Red Eyes White Fur and Black Eyes White Fur and Red Eyes
Predicted Fraction
9
⇒ 16/16
3
⇒ 0/16
3
⇒ 0/16
1
⇒ 0/16
Predicted Percentage
%
%
%
%
Finally, convert the predicted fractions into predicted percentages.

Answer 1

If black fur (B) is dominant to white (b) and black eyes (E) are dominant to red (e), a BbEe × BbEe cross gives the 9:3:3:1 phenotypic ratio. Filling your table:

- Black Fur and Black Eyes: predicted fraction = 9/16 → predicted percentage = 56.25%
- Black Fur and Red Eyes: predicted fraction = 3/16 → predicted percentage = 18.75%
- White Fur and Black Eyes: predicted fraction = 3/16 → predicted percentage = 18.75%
- White Fur and Red Eyes: predicted fraction = 1/16 → predicted percentage = 6.25%

(Conversion: fraction × 100; e.g., 9/16 = 0.5625 = 56.25%.)