Why Extra Fingers?
Polydactyly, a congenital abnormality, is the presence of more than the normal number of fingers or toes. Although the condition is usually not life-threatening or even particularly debilitating, most people in Western societies have the extra digits removed surgically, usually while the child is about 1 year of age. According to wikipedia, the condition is usually inherited as an autosomal dominant characteristic and has an incidence of 1 in every 500 live births although the frequency is higher in some groups (for example among the Amish).
