If a curly haired father and straight haired mother 8 children are born .the ratio of curly and straight haired will be ......

Answer 1

<<Hair type is an interesting case of something called incomplete dominance. What this means is that with hair type, if you have one of each version of the gene, you get a mix of the two or wavy hair. So for hair type, CC gives curly, Cs gives wavy and ss gives straight hair.>>
All children will be Cs, or wavy hair, no curly, no straight.

Now if your teacher does not know this, or perhaps she actually technically did not mean one parent had curly hair, and confused wavy hair as "curly". In that case Wavy and straight gives
Cs vs ss
2Cs
2ss and the ratio of Wavy (Curly?) to straight would be 1:1