If a brown hair allele is represented with a B, and blonde hair is represented with a b

Answer:
B. Brown Hair is dominant.
Explanation:
The dominant allele is represented with a capital letter, and a recessive allele is represented with a lower case letter.
Therefore, In this example brown hair is dominant. :)
Answer:
B; brown hair is dominant.
Explanation:
Alleles that are portrayed with uppercase letters are known to be dominant alleles. Brown hair is a darker color found commonly and is dominant over the blonde color which is overall lighter thus recessive.
So your answer would be B; Brown hair is dominant
Hope this helps!