A long molecule built from four nucleotide bases: adenine, thymine, cytosine, and guanine.
Start here, then move into the molecular detail when the relationship feels clear.
Genetics foundation 01
What is DNA?
DNA is the molecule that stores genetic information. Its structure creates a practical path from the whole genome to chromosomes, genes, and individual sequence differences.
Educational and research use only. Not a clinical interpretation.DNADNA → gene → variant
Put the idea in context.
DNA is the molecule that stores genetic information. Its structure creates a practical path from the whole genome to chromosomes, genes, and individual sequence differences.
Keep the reference frame visible.
In standard double-stranded DNA, antiparallel strands are held together by complementary base pairing: A with T and C with G. Sequence and genomic context determine which regions contribute to functional products.