• Definitions and genetic terminology
• Current methodology and hypotheses of behaviour genetics analysis
• Heritability
— Heritability is not inheritance
— No support from behaviour genetics model fitting
— Calculation of the heritability of fertility
— Regression due to an underlying third factor
— The blind alley of heritability
• Some issues concerning the polygenic model
• Why are Fisher’s kinship correlation formulae wrong?
• Confusion between statistical and genetic regression
• Difficulties in making a complete genetics model of a behavioural trait
• Does the coefficient of genetic variation have any value?
• Genetic and environmental effects on behaviour cannot be separated
• Isolating genetic variation in fitness is difficult
— Differences in fitness between men and women
— Mutations and sterility
— Assortative mating for fitness
— Number of children is not an appropriate measure of fitness
• The future of Population genetics
• Genomic research and demographic behaviour
— Advances in gene technology
— Some factors associated with male infertility
— Female infertility
• Molecular genetic and genomic approaches
• Conclusion
• REFERENCES