FAMILY ALBUM

Widows Peak

  There is technically no cold hard evidence that Widows Peak is actually a trait, most scientists say. Widows peak is when there’s a V shape at the hair line that dips down in the middle of the forehead, while others have a straight hair line.

The theory is that it’s a normal trait controlled by one gene and two alleles, which is dominant, but there is still no evidence leading to that.  

There are blood groups; A, B, O, AB, and they all can be either + or -. A has the A antigen, but has B antibody. B has the B antigen, but A antibody. AB, the rarest of groups, has both A and B antigens, but no A or B antibody on the plasma. O has neither A or B antigens, but has both A and B antibodies.