What discovery forms the foundation for understanding genetic diseases?

What discovery forms the foundation for understanding genetic diseases?

• A. Structure of DNA
• B. Chromosome replication
• C. Protein synthesis
• D. RNA transcription

Answer: (A)

Understanding genetic diseases starts with how genetic information is stored and transmitted. The discovery of the DNA structure—the double helix with specific base pairing—shows that information is encoded in a precise sequence of nucleotides and can be copied accurately during replication. This explains how traits are inherited and how small changes in the sequence, mutations, can disrupt gene function and lead to disease. With DNA established as the carrier of genetic information, we can connect how mutations alter proteins or their regulation to produce disease phenotypes, and it opened the door to modern sequencing and gene-editing approaches. While chromosome replication, protein synthesis, and RNA transcription are important parts of how genes are expressed and inherited, they depend on the underlying coded DNA. So, revealing DNA’s structure is the foundational discovery for understanding genetic diseases.

Understanding genetic diseases starts with how genetic information is stored and transmitted. The discovery of the DNA structure—the double helix with specific base pairing—shows that information is encoded in a precise sequence of nucleotides and can be copied accurately during replication. This explains how traits are inherited and how small changes in the sequence, mutations, can disrupt gene function and lead to disease. With DNA established as the carrier of genetic information, we can connect how mutations alter proteins or their regulation to produce disease phenotypes, and it opened the door to modern sequencing and gene-editing approaches. While chromosome replication, protein synthesis, and RNA transcription are important parts of how genes are expressed and inherited, they depend on the underlying coded DNA. So, revealing DNA’s structure is the foundational discovery for understanding genetic diseases.