Final answer:
A two-breed terminal system is a breeding system used in livestock production where two different breeds of animals are crossed to produce offspring that are then sold or used for meat production.
Step-by-step explanation:
A two-breed terminal system is a breeding system used in livestock production where two different breeds of animals are crossed to produce offspring that are then sold or used for meat production. This system takes advantage of the heterosis or hybrid vigor, which is the increased performance and productivity observed in the hybrid offspring compared to the purebred parents.
Examples of two-breed terminal systems include crossing a meat breed like Angus or Hereford with a maternal breed like Angus or Shorthorn. The meat breed provides fast growth and high meat quality, while the maternal breed contributes good mothering abilities and reproductive performance.