Question

black fur and black eyes\tblack fur and red eyes\twhite fur and black eyes\twhite fur and red eyes
predicted fraction\t9/16\t3/16\t3/16\t1/16
predicted percentage\t56.25%\t18.75%\t18.75%\t6.25%
simulated fraction\t5/10\t2/10\t2/10\t1/10
simulated percentage\t50%\t20%\t20%\t10%
in the dihybrid cross, both of the parents had black fur and black eyes.
the offspring varied.
complete
the predicted values for the four phenotypes form a ratio. the simulated values match this predicted ratio.

Explanation:

1. For the first blank, in a dihybrid cross (assuming independent assortment of two traits), the predicted phenotypic ratio for the offspring of two heterozygous parents (for both traits) is 9:3:3:1. Looking at the predicted fractions (9/16, 3/16, 3/16, 1/16), they correspond to the 9:3:3:1 ratio (simplifying the fractions' numerators: 9, 3, 3, 1).
2. For the second blank, the simulated fractions are 5/10, 2/10, 2/10, 1/10, which simplify to 5:2:2:1. This is close to 9:3:3:1 (when scaled or compared), so the simulated values approximately match the predicted ratio.

Answer:

First blank: 9:3:3:1; Second blank: approximately