In which unit is the selection differential expressed?

In which unit is the selection differential expressed?

• A. Units of the environment
• B. Units of the trait
• C. Weight measurements
• D. Coefficient of variance

Answer: (B)

The selection differential is expressed in units of the trait because it measures the difference in the average phenotype of selected individuals compared to the average phenotype of the entire population. This difference reflects the extent to which selection has influenced the trait in question. Essentially, it tells us how much the selected individuals differ from the average in a specific characteristic, such as height, weight, or length, and is thus directly tied to the measurements of that trait itself.

This understanding aligns with breeding and genetics as it provides a quantifiable metric that can guide breeders in their selecting processes, allowing them to make informed decisions based on the improvements or variations of specific traits over generations.