Early in my teaching career I modified an existing diagram to create this image which shows how meiosis in testes and ovaries functions to complete the human life cycle. I could not in good conscience use existing diagrams where the two rows were labeled “Mother” and “Father”, “Woman” and “Man”, in text colored pink and blue, etc.. I needed something that precisely communicated the structures and processes involved, in a way that was simple for my students. Reflecting back, the phrases in parentheses may or may not be necessary depending on the audience. - Sam