In a simplified version of hair color determination for humans, there is one gene locus that can have two alleles, dominant brown (B) and recessive blond (b). There is another recessively epistatic gene locus (E/e) on a different chromosome that will create red hair regardless of the first gene's genotype. If a red-haired child is born to 2 brown haired parents, what are the genotype(s) of the parents?
a) Both must be B_Ee
b) One must be B_Ee and the other could be B_EE
c) One must be B_Ee and the other could be B_ee
d) Both must be B_ee
Ans: a) Both must be B_Ee
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