Two types of twins
There are two types of twins: identical twins and fraternal twins. There are two types of twins. In identical twins, the DNA is the same. In fraternal twins, the DNA is different just like any other siblings.
Identical twins' hair may look different with age
The hair of identical twins look similar at young ages and may look different when older. Genetic hair loss has a lot do to genetics, but not everything. Smoking, ultraviolet radiation, medical conditions (ie. thyroid disease), obesity, and stress all affect the process of genetic hair loss.
Dr. Jeff Donovan is a Canadian and US board certified dermatologist specializing exclusively in hair loss. To schedule a consultation, please call the Vancouver office at 604.283.9299