What are two characteristics of Purpose-bred animals?

• A. Genetically similar to humans; Acclimated to research environment & handling
• B. Genetically dissimilar to humans; Not acclimated
• C. Wild-caught; Not acclimated
• D. Genetically similar to humans; Not acclimated

Answer: (A)

Purpose-bred animals are chosen and raised specifically for research, so their genetics are controlled and their health status is defined. This genetic uniformity helps produce consistent, reproducible results across experiments. They are also acclimated to the research setting and to handling by staff, which reduces stress responses that can otherwise confound data and welfare concerns.

Wild-caught animals or those not acclimated would bring unpredictable variability due to unknown health histories and higher stress, making results harder to interpret. Likewise, while these animals are chosen for their usefulness in modeling human biology, the key practical point is that both their genetic background and their familiarity with the lab environment improve reliability and relevance of the research.