But they don't call them that and don't do much to encourage audience participation in working them out, which is essential to absorbing Mendelian genetics. A formal text, with chapter-end questions and exercises, also wouldn't hurt. Readers pursuing independent studies via the guide are advised to pursue them slowly, and a workbook wouldn't hurt them, either. You may find anthropomorphic enzymes uproarious, but on the whole the jokes seem a bit lame to me. Expect Blondie, not Doonesbury.
Mitosis is a cinch to grasp, and meiosis is pretty good too.
The drawings convey far more information to the graphically impaired, among whom I am numbered, than illustrations in the average expensive textbook. Highly recommended on those grounds alone. For the most part, the molecular genetics of the past two or three decades gets short shrift. No cDNA, no mitochondrial DNA, no HOX genes, no alternative splicing, no knockout mice, no DNA chips, no cross-species sequence comparisons, no gene families, no bioinformatics. No mention of PCR, which appeared the same year this book was first published, which some think is the most important methodological advance ever in biology, and is now widely available to high-school students.