Examine the back side (dorsal surface) of your fingers and locate the mid-digital are between the two central joints. Look very carefully and discover if you possess a few hairs in the mid-digital region on any of your fingers.

Henry possesses mid-digital hairs, but his wife does not. Of their six children, three have mid-digital hairs and three do not. One of Henry's daughters with mid-digital hair grows up and marries a man who also has mid-digital hairs. This couple has two children, none of whom have mid-digital hair. What is the most likely mode of inheritance of mid-digital hair?