The offspring of Mendel's first cross were called the:

1. Filial means offspring, a daughter or a son. 2. The first cross produced the first filial generation. 3. These offspring were called the F1, or the first filial generation. 4. Growing seeds from those plants produced the F2, or second filial, generation. _Source: OpenStax Biology for AP(R) Courses (CC BY 4.0), Ch 12 'Mendel's Experiments and Heredity', sections 12.1-12.3_