Which option lists traits that are typically highly heritable?

Which option lists traits that are typically highly heritable?

• A. Height
• B. Milk production
• C. Bone and fat content, height, length, backfat
• D. Reproduction

Answer: (C)

Heritability is about how much of the differences you see in a trait among individuals come from their genes versus the environment. When a trait is highly heritable, selecting individuals based on their phenotype leads to faster genetic gains because genetics largely shape that trait. The traits listed—bone and fat content, height, length, and backfat—are typically strongly controlled by genetics. They’re body-structure and composition traits where genetic differences largely drive the variation, and environmental factors like diet or management have comparatively smaller sway. That makes them good targets for selection, with reliable changes across generations. In contrast, traits like milk production and reproduction are more sensitive to environmental influences such as nutrition, management, health, and physiological conditions, which means they generally have lower heritability and respond more slowly to selection on phenotype.

Heritability is about how much of the differences you see in a trait among individuals come from their genes versus the environment. When a trait is highly heritable, selecting individuals based on their phenotype leads to faster genetic gains because genetics largely shape that trait.

The traits listed—bone and fat content, height, length, and backfat—are typically strongly controlled by genetics. They’re body-structure and composition traits where genetic differences largely drive the variation, and environmental factors like diet or management have comparatively smaller sway. That makes them good targets for selection, with reliable changes across generations.

In contrast, traits like milk production and reproduction are more sensitive to environmental influences such as nutrition, management, health, and physiological conditions, which means they generally have lower heritability and respond more slowly to selection on phenotype.