Multiple choice According to Mendel, the characteristics of Pisum sativum were determined by inheritance of genes from both parents inheritance of genes from one parent only comparitive health of each parent plants at the time of pollination comparitive health of each parent plants at the time of fertilisation Reveal answer Fill a bubble to check yourself A Correct answer Explanation Mendel called genes as factors. In all the individuals, each inherited trait is determined by at least one gene from each parent.