I have blonde hair and my husband has black hair. We have two boys who have deep auburn hair. Is this rare for both of our boys to get this hair trait?

Answer

It is likely that you and your husband each carry one mutation in the MC1R gene. So although you do not express the trait, you have a 25% chance of passing both alleles on to your children (with simple genetics) to demonstrate auburn hair. In actuality, genetics are a bit more complicated, since there are several alleles on MC1R that lead to displaying red hair.

Updated on March 28, 2018

Original Article:

Redheads: The Genetics of Hair Color
By Leah Lefler
working