What is the purpose of maintaining breeding colonies with careful records?

• A. To maximize litter size regardless of genetics.
• B. To minimize record-keeping and reduce administrative overhead.
• C. To supply animals with consistent genotype/phenotype for studies.
• D. To manage genetic diversity, avoid inbreeding, and supply animals with consistent genotype/phenotype for studies.

Answer: (D)

Maintaining breeding colonies with careful records focuses on managing genetics to keep lines stable and reliable for research. By tracking pedigrees, mating pairs, generations, and outcomes, a facility prevents mating close relatives too often, monitors genetic diversity, and catches drift or unwanted traits early. This meticulous record-keeping ensures that animals produced for studies have a consistent genotype and phenotype, which is essential for experimental reproducibility and meaningful comparisons across studies. Detailed records also help verify strain status, plan matings to meet specific experimental needs, and maintain overall colony health. In contrast, aiming only to maximize litter size ignores genetic integrity, and reducing records undermines quality and reproducibility.