Breeding outbred stocks results in which characteristic?

• A. Homogeneity
• B. Maximum mutations
• C. Minimal hybrids
• D. Genetic variation

Answer: (D)

Breeding outbred stocks is aimed at preserving genetic diversity. By pairing unrelated individuals over generations, you maintain a wide mix of alleles and higher heterozygosity, so animals within the population are genetically distinct from one another. This results in genetic variation across the stock rather than a uniform, identical genetic makeup. Such variation mirrors what’s seen in natural populations and can make study findings more generalizable, though it also means more variability in phenotypes and typically requires larger sample sizes to detect effects.