Colorblindness is more common in males than in females because a. the allele for colorblindness is dominant and located on the x chromosome. b. the allele for colorblindness is recessive and located on the x chromosome

There is actually more than one type of color blindness. For these purposes I'll assume the question is asking about the most common one (red-green). The red-green is B.) recessive and on the X chromosome, which is why males get it more often, as males only have one copy of the X chromosome.

Mark brainliest if I helped you. 

Ithink that b is correct but just in case wait to see if someone else answers