Question

the primary advantage of genotypic methods of identification is _______.
multiple choice
○ they are widely available
○ they are less expensive than other methods
○ all of the choices are correct.
○ they are easier than any other method
● culturing of the organism is not required

Explanation:

To determine the primary advantage of genotypic identification methods, we analyze each option:

• "They are widely available": Genotypic methods (e.g., PCR, sequencing) require specialized equipment and expertise, so they are not universally "widely available" compared to simpler methods.
• "They are less expensive than other methods": Genotypic techniques often involve costly reagents and equipment, so this is incorrect.
• "All of the choices are correct": Since the other options are incorrect, this is also incorrect.
• "They are easier than any other method": Genotypic methods require technical skills (e.g., handling DNA, running assays), so they are not inherently easier than simpler phenotypic methods.
• "Culturing of the organism is not required": Genotypic methods (like DNA-based tests) can identify organisms directly from samples (e.g., clinical specimens) without needing to culture them (which is time - consuming or impossible for some pathogens). This is a key advantage.

Answer:

The option with the blue dot: "culturing of the organism is not required" (the last option in the list, with the blue selection indicator).