Mendel called the trait that appeared in the first generation the:

1. Crossing two true-breeding parents gave offspring showing only one of the two forms. 2. Mendel used the term dominant to refer to the trait that was observed. 3. He used recessive to denote the non-expressed trait, the one that had disappeared in this first generation. 4. Nothing blended, which was the point of his choice of characteristics. _Source: OpenStax Biology for AP(R) Courses (CC BY 4.0), Ch 12 'Mendel's Experiments and Heredity', sections 12.1-12.3_