Answer:
As mentioned in the question, wavy hair is a result of phenomenon of incomplete dominance where no allele is dominant over the other.
So if we say a man with curly hair (hh) marries a woman with straight hair (HH), we need to find out will their kids have straight hair or not.
Let us cross them:
Parents: hh X HH
Gametes: h : h and H :H
Offspring: hh: Hh: hH: HH
Probability of children with straight hair (HH) = 25 %
Probability of children with curly hair (hh) = 25%
Probability of children with wavy hair = 50 %
So there is a chance of 25 % that their kids can have straight hair.
Hope it helps!
Step-by-step explanation: