Genetics is a great science, as much as unpredictable. Viral Strange collected 12 photos showing that genetics sometimes don’t bring predictable results.

“My dad and I are a great reminder that genetics isn’t an exact science.”

When twins marry twins and have twins too.

The redhead gene is strong

These girls are twins!

“Twins holding twins in 1987. The same twins holding the same twins in 2017.”

Albino family

A grandpa and his granddaughter both have a rare skin disease called vitiligo.

“My dad and I in 1991, and my cat and I in 2013. Find 10 differences!”

“Me at the age of 17 and my daughter at the age of 14.”

A German no-rule fights champion and his dad

41-year-old blogger Lure Hsu (left) with her sisters: 40-year-old Fayfay (middle) and 36-year-old Sharon (right).

Swedish fitness model Anna Nystrom and her mother

What do you think about these pictures? Do you have any unpredictable genetic cases in your family? Let us know.