The Punnett square below shows the offspring of two roan colored cows, whose hair color inheritance is codominant. BB creates a red phenotype, WW creates a white phenotype, and BW creates a roan phenotype. What would the genotypes of the parents have to be to ONLY make roan colored offspring?

 The parents would have to be BB and WW.

Explanation:

Roan color  = BW

Let's do the punnett square to prove our answer.

             B       B

W        BW     BW

W        BW     BW

100% of the offspring will be BW which is roan color.

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hope i'm right

explanation:

the correct answer was location c, because earth is tilted away from the sun at this time