Human genetic variation
Human genetic variation means that everyone's DNA is a little bit different. DNA is like a recipe that tells our bodies how to make us look and act the way we do. Some people have dark hair, some people have light hair. Some people are tall, while some people are short. This is because everyone's recipe is a bit different. Our DNA recipe makes us unique. Even though we may look similar, no two people have the exact same DNA recipe.
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