Do you know what physical traits are hereditary?
Heredity Definition: inherited traits passed down from the parent’s genes to the child.
What physical traits are genetically passed down from a single gene?
- Eye color is genetic.
Eye color is also based on how much melanin you have, which determines how much color pigment is deposited in your iris. Just like skin color and hair color, our genes give us a natural color, but those colors will change as we are exposed to more or less sunlight.
FUN FACT: Your true eye color is not determined until age 3!
What is Genetic ? 