Genetic admixture is like when you mix different colored paints together to get a new color. People have different colors of genes too, and sometimes they mix together.
When different groups of people have babies, their genes mix together and it creates a new genetic mixture. For example, if a person from Europe has a baby with a person from Asia, their baby would have a genetic mixture of both Europe and Asia.
This happens because our genes have information about our ancestors, like where they are from, and this information is passed down to us from our parents. So, when people from different parts of the world have babies, new combinations of genetic information are created.
Over time, different groups of people have mixed together, so many people today have genetic admixture from many different parts of the world. This is why some people might have traits that are common in one group of people but not in another, because their genes come from different places.
Genetic admixture is important to study because it helps us understand how people have moved and mixed throughout history. Scientists can look at people's genes and learn more about our shared history and where our ancestors come from.