Thumb Tricks

Hold your hand up as if you’re about to belt out the hit, “Stop! In The Name Of Love.” Does your thumb form a straight line or curve as if forming a circle? This small feature is determined by your genetics. A curved thumb is a recessive trait, so if you and your partner both have a curved thumb, so will your child.

However, if you both have straight thumbs, you may still be carriers of the recessive gene. That means there’s still a chance your toddler could end up sucking on a curved thumb when drifting to sleep.