Francis Crick, Gregor Mendel, Reginald Punnett, Carol Greider, and David Suzuki are all individuals who have made significant contributions to the field of genetics. Francis Crick is known for his co-discovery of the structure of DNA, while Gregor Mendel is considered the father of modern genetics for his pioneering work on inheritance in pea plants. Reginald Punnett developed the Punnett square, a tool used to predict the outcomes of genetic crosses. Carol Greider discovered the enzyme telomerase and its role in telomere maintenance. David Suzuki is a renowned geneticist and environmentalist who has popularized science through his television programs and books.