Exactly 66 years ago, on April 25, 1953, Francis Crick and James Watson published their famous article that showed that the shape of DNA is a double helix. They weren’t able to see DNA directly ...

DNA is made of two winding strands that form a double helix, which looks like a twisted ladder. The strands are made of alternating sugar and phosphate groups. In these groups are deoxyribose and ...

DNA is a molecule in the shape of a double helix, which looks like a twisted ladder. ... Typically, autosomal DNA tests look at less than 1% of your genome — around one million nucleotide sites.

Not all DNA looks like the familiar twisted ladder. Sometimes, parts of our genetic code fold into unusual shapes. One such structure, the G-quadruplex (G4), looks like a knot. These knots can ...