How are eye color and hair color passed down in families?
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How are eye color and hair color passed down in families?
Have you ever noticed how a family can share the same nose, the same laugh, or the exact same shade of brown eyes? That's not a coincidence. Hidden inside every cell of your body is a tiny instruction booklet, and a copy of it came straight from your parents.
This booklet is written in something called DNA. Think of DNA as a very long recipe for building a person — and tucked inside that recipe are short chunks called genes. Each gene is like a single instruction: one for eye color, one for hair color, and thousands more.
