How Does Genetics 101 | National Geographic Work?

Genetics is like a recipe that tells your body how to make you, and your family members too.

Imagine your body is a kitchen, and genes are like ingredients in a cookbook. Every person has their own special cookbook inside them, which came from their parents. When babies are born, they get half of their cookbook from mom and half from dad. That’s how you can look like one parent but also have traits from the other.

Let's say your gene for eye color is like a spice in the recipe, if your mom has brown eyes and your dad has blue eyes, it’s like mixing cinnamon and vanilla. Depending on which spices get picked, you might end up with brown, blue, or even green eyes!

Sometimes, one spice (or gene) can be stronger than another. If you have a dominant trait, like having curly hair, that trait will show up even if the other one is weaker.

When your parents make a baby, they each give one copy of their recipe to the new person. It’s like picking one sock from each parent's drawer and making a new pair for the baby. That’s how traits, like height or freckles, can be passed down through families.

So genetics is just the story of how your body uses recipes (genes) from your parents to make you who you are! Genetics is like a recipe that tells your body how to make you, and your family members too.

Imagine your body is a kitchen, and genes are like ingredients in a cookbook. Every person has their own special cookbook inside them, which came from their parents. When babies are born, they get half of their cookbook from mom and half from dad. That’s how you can look like one parent but also have traits from the other.

Let's say your gene for eye color is like a spice in the recipe, if your mom has brown eyes and your dad has blue eyes, it’s like mixing cinnamon and vanilla. Depending on which spices get picked, you might end up with brown, blue, or even green eyes!

Sometimes, one spice (or gene) can be stronger than another. If you have a dominant trait, like having curly hair, that trait will show up even if the other one is weaker.