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genetics 101

23andMe provides a collection of educational materials to guide you on your personal journey of genetic discovery. Explore our learning resources and discover the world of genetics!

Part 1: What are genes?

Find out about the basics of cells, chromosomes, and the genes contained in your DNA.

Part 2: What are SNPs?

Learn about the variations in human DNA called SNPs, and how they can be used to understand relationships between people.

Part 3: Where do your genes come from?

Find out how chromosomes and genes are passed down from parent to child.

Part 4: What are phenotypes?

Discover how your observable traits, or phenotypes, are the result of interactions between your genes and environment.