How are modern food varieties created by selective breeding?

Modern food varieties are created through selective breeding by choosing specific plants or animals with desirable traits, such as higher yield, disease resistance, or improved flavor. Breeders cross these selected individuals over multiple generations, enhancing the desired characteristics while minimizing undesirable ones. This process often involves careful monitoring and evaluation to ensure that the offspring exhibit the intended traits consistently. Advanced techniques, including genetic markers and biotechnology, can also complement traditional selective breeding methods to accelerate the development of new varieties.