In transgenic research, what is the main advantage of uniform phenotypes among animals?

• A. Easier maintenance
• B. Clearer interpretation of transgene effects
• C. Higher fertility
• D. More rapid growth

Answer: (B)

Reducing genetic background variation to clarify transgene effects. When animals share uniform phenotypes, differences you observe between transgenic and non-transgenic groups are more likely due to the transgene itself rather than random genetic differences. This makes it easier to interpret what the transgene is doing and improves the reliability of conclusions, because the data aren’t as muddled by background variability. It also boosts statistical power and reproducibility across litters and facilities. While easier maintenance, higher fertility, or faster growth can be appealing outcomes, they aren’t the direct benefit of uniform phenotypes in transgenic studies; those traits depend on many other factors.