Two wavy-haired parents may have children with straight, wavy or curly hair, but the chances are slight that there will be curly-hair offspring.
(Two wavy-haired parents; may have; children with straight, wavy or curly hair) (the chances; are; slight that there will be curly-hair offspring)
Two wavy-haired parents the chances
may have are
children with straight, wavy or curly hair
slight that there will be curly-hair offspring