Mendel's 1865 publication reported crosses involving how many characteristics?

1. Each characteristic he chose had two clearly contrasting forms. 2. In his 1865 publication, Mendel reported the results of his crosses involving seven different characteristics, each with two contrasting traits. 3. For the other six characteristics beyond flower colour, the F1 and F2 generations behaved in the same way. 4. In all seven pea-plant characteristics, one of the two contrasting alleles was dominant and the other recessive. 5. The consistency across all seven is what made the pattern convincing. _Source: OpenStax Biology for AP(R) Courses (CC BY 4.0), Ch 12 'Mendel's Experiments and Heredity', sections 12.1-12.3_