i had a headful of black straight hair when i was born. then it fell out on the sides and back so i had a ton of hair on top that turned curly.
my daughter was born with a head full of straight brown hair too. it was wavy when wet and then it would dry straight. shes 11 months old now and has big curls. the sides and back of her hair fell out too, but se has a massive amount of hair on top while the back and sides are filling in still.