What shape did Watson and Crick identify DNA to have?

Watson and Crick identified DNA as having a double helix shape, which is a fundamental understanding in molecular biology. The double helix structure consists of two long strands of nucleotides that twist around each other, resembling a spiral staircase. This configuration not only allows DNA to compactly store genetic information but also enables the strands to separate easily during processes like DNA replication. The specific arrangement of the nucleotide bases (adenine, thymine, cytosine, and guanine) on the strands contributes to the genetic code, and the complementary base pairing (A with T and C with G) further stabilizes the structure. Understanding the double helix model has been pivotal in advancements in genetics and biotechnology, influencing everything from genetic research to medical applications.