Question

step 3: predict the offspring of a dihybrid cross (bbee × bbee)
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 /16 /16 /16 /16

Explanation:

Step1: Determine gametes

For \(BbEe\times BbEe\), each parent can produce 4 types of gametes: \(BE\), \(Be\), \(bE\), \(be\).

Step2: Create Punnett square

The Punnett square for \(BbEe\times BbEe\) has 16 cells.
For fur color: \(B\) (black) is dominant over \(b\) (white). For eye color: \(E\) (black) is dominant over \(e\) (red).

• Black fur and black eyes (\(B\_E\_\)):

Number of genotypes: \(BBEE\) (1), \(BBEe\) (2), \(BbEE\) (2), \(BbEe\) (4). Total \(9\)

• Black fur and red eyes (\(B\_ee\)):

Number of genotypes: \(BBee\) (1), \(Bbee\) (2). Total \(3\)

• White fur and black eyes (\(bbE\_\)):

Number of genotypes: \(bbEE\) (1), \(bbEe\) (2). Total \(3\)

• White fur and red eyes (\(bbee\)):

Number of genotypes: \(bbee\) (1). Total \(1\)

Answer:

9/16, 3/16, 3/16, 1/16