Which branch of genetics is most directly associated with the use of CRISPR-Cas9 gene editing technology?

• A. Molecular genetics
• B. Quantitative genetics
• C. Classical (Mendelian) genetics
• D. Population genetics

Answer: (A)

Verified step by step guidance

1. Understand the main branches of genetics: Classical (Mendelian) genetics studies inheritance patterns; Population genetics focuses on gene frequency changes in populations; Quantitative genetics deals with traits influenced by multiple genes; Molecular genetics examines the structure and function of genes at a molecular level.
2. Recognize that CRISPR-Cas9 is a gene editing technology that allows precise modification of DNA sequences within an organism's genome.
3. Identify that the use of CRISPR-Cas9 involves manipulating DNA molecules directly, which falls under the study of genes and their molecular mechanisms.
4. Conclude that the branch of genetics most directly associated with CRISPR-Cas9 is Molecular genetics, as it focuses on gene structure, function, and manipulation at the molecular scale.
5. Therefore, when asked which branch is linked to CRISPR-Cas9, select Molecular genetics based on its focus on gene editing and molecular-level genetic analysis.