Curly hair (C) is dominant where straight hair (c) is recessive. If a person who is CC were to have children with a person who is cc, could it be possible for them to have a child with straight hair?
Explanation: It is not possible because if you draw a punnett square you see that the only phenotype you get is Cc. C (curly hair) is dominant over c (straight hair) so curly hair will always be expressed.
