Question

Who gave the double helical model of DNA?

Hint:

The discovery of DNA's double helix structure was crucial to understanding genetics and molecular biology.

Answer 1

Step 1: Watson and Crick’s Contribution.
The double helical model of DNA was proposed by James Watson and Francis Crick in 1953. Their work was based on X-ray diffraction images produced by Rosalind Franklin, which helped them deduce the structure of DNA as two intertwined strands forming a double helix.
Step 2: Conclusion.
Thus, the double helical model of DNA was given by Watson and Crick.
Final Answer: \[ \boxed{\text{Watson and Crick proposed the double helical model of DNA.}} \]