AncestryDNA® Learning Hub

Glossary

Curious about science and your DNA? You’ve come to the right place. Here’s a list of key terms and topics to help you better understand your genetics. From DNA 101 to the genetics of personal traits, this resource will come in handy as you explore the exciting world of DNA.

A
Adenine
Adenine is one of the 5 bases found in nucleotides, the building blocks of nucleic acids like DNA and RNA. It is one of two purines (the other is guanine) and pairs with the base thymine in the DNA double helix. In RNA, it pairs with the base uracil.
Learn more about DNA Nucleotides
Autosomal DNA Testing
Autosomal DNA testing looks at the DNA in all of your chromosomes (except for your sex chromosomes) and then looks for large areas of shared DNA between you and other people in a DNA database to find close relatives.
Learn more about autosomal DNA Testing