Drosophila melanogaster is commonly known as the ________, widely used in genetic studies because it has a short generation time.

• A. Fruit fly
• B. Mouse
• C. Zebrafish
• D. C. elegans

Answer: (A)

Drosophila melanogaster is commonly known as the fruit fly, and its key advantage in genetic studies is its very short generation time. Because it goes from egg to reproducing adult in about a week under typical lab conditions, researchers can observe several generations in a relatively short period, which makes it ideal for tracking inheritance patterns, performing crosses, and mapping genes. Its small size, ease of care, large numbers of offspring, and many well-characterized mutations have made it a foundational model organism in genetics, following the early discoveries about how traits are inherited. Other organisms like mice, zebrafish, or C. elegans are valuable too, but their longer generation times can slow experiments that rely on rapid genetic analysis, whereas the fruit fly accelerates discovery and teaching in this field.