Assistant Laboratory Animal Technician (ALAT) Practice Exam

What is the typical weight range of an adult male mouse in grams?

1. 10-20 grams

2. 20-40 grams

3. 40-60 grams

4. 60-80 grams

The correct answer is: 20-40 grams

The typical weight range for an adult male mouse is generally between 20 to 40 grams. This range can vary slightly depending on the specific strain of the mouse and environmental factors, but it is widely accepted within the field of laboratory animal science. Understanding the normal weight of an adult male mouse is crucial for several reasons. It helps laboratory personnel monitor the health and well-being of the animal, as significant deviations from the norm can indicate potential health issues or the need for dietary adjustments. Moreover, knowing the typical weight range aids in the selection of appropriate dosing for experiments involving medication or substances, as most protocols rely on accurate weight data to ensure both effectiveness and safety. In contrast, the options that fall outside this range reflect either juvenile weights or potential over- or undernourished adult mice, which are not representative of a healthy adult male mouse. Familiarity with these benchmarks is essential for anyone working with laboratory mice, thus reinforcing the significance of recognizing the accepted weight range.