Aspects of animal breeding

• Trait (e.g., running speed or milk production or coat colour) under selection is heritable.
• Those animals have different genetic backgrounds so that selection is possible.
• Decide which animals are allowed to mate and produce members of the next generation.
• looking at a shift in population average phenotype from one generation to the next. So, animal breeding works at population level, not automatically at individual level.
• Breeding decisions are made with the future in mind.