Includes bibliographies and index.

The beginning of genetics : Mendel's first law // Mendel's second law // Predictions : Probability, binomial theorem and the chi square test // The varieties of gene expression // The measurement of gene expression : qualitative and quantitative traits // Mitosis, chromosomes and meiosis // Sex linkage and sex determination // Linkage,crossing over and mapping // Changes in chromosome number and structure // Genes and the origin of the phenotype // Nucleic acid : the molecular basis of the genome // Genetic mechanisms of bacteriophages // Genetic mechanisms of bacteria // Defining the gene // The mechanisms of gene expression // The genetic code and its validation // mutation // Gene regulation in bacteria and bacteriophages // Gene regulation and chromosome organization in eukaryotes // Inheritance through the cytoplasm // Gene frequencies in natural population // Changes in gene frequencies // Population change and evolution // Molecular evolution // Answers to problems // Index //