Mendel’s pea hybridization experiment was learned in the first year of high school. According to the query of public information, Mendel’s Pea Hybridization Experiment is a course for the first year of high school. The first lesson in the textbook is Mendel’s Pea Hybridization Experiment (1) - Synchronous Biology Teaching Courseware for the First Year of High School in the 2020-2021 School Year (People’s Education Edition 2019 Required 2).