If one parent has straight hair and the other curly, the children will all have curly hair if the curly-hair parent is true to type (i.e.;
(one parent; has; straight hair and the other curly) (the children; will have; curly hair) (the curly-hair parent; is; true to type)
one parent the children the curly-hair parent
has will have is
straight hair and the other curly
curly hair
true to type