Examines historically the attitudes of United States and British geneticists on the topic of race crossing. Between 1930 and 1950 the attitudes changed from a condemnation of wide race crosses because of deleterious effects to a belief that such inter-racial crosses were at worst biologically harmless. (JR)

Examines limitations of the heritability concept and heritability analysis, and discusses a conventional application of heritability analysis, IQ scores as measurements of a phenotypic character, the heritability of IQ, and the relationship of IQ and race. (JR)

Summarizes the views of Ernst Mayr on the controversy over evolution which exists between physical scientists and biologists. Discusses the uniqueness of individuals, work by population geneticists and mathematical geneticists, complexity in nature, rates of change, modes of change, and the need to ask "why". (DC)

Presents the viewpoints of a prominent behavioral scientist concerning the role of the environment in the evolution of behavior. (CS)

Discusses the applicability and advantages of using yeasts as popular and ideal model systems for studying and understanding eukaryotic biology at the cellular and molecular levels. Cites experimental tractability and the cooperative tradition of the research community of yeast biologists as reasons for this success. (RT)

Discussed are some of the strategies required to try to detect and explain DNA markers that account for small amounts of behavioral variation. Situations in both animal and human behavior are described. The link between molecular biology and behavior is highlighted. (CW)

Stresses the importance of investigating bacterial mechanisms to discover clues for a greater understanding of cells. Cites examples of study areas of biological significance which may reveal information about the evolution of prokaryotes and eukaryotes and lead to a comprehensive theory of cell biology. (RT)

Discusses insights discovered from research into human biology that are raising possibilities for therapy, prevention of disease, and challenges to society in the form of ethical decisions about the appropriate application of genetic information. (Author/RT)

Discusses the advantages of Xenopus laevis as an experimental animal in the study of embryogenesis in vertebrates. Summarizes the contributions of this system to the analysis of ribosomal and 5S RNA genes, and the diverse and highly productive applications of the oocyte injection technology. (RT)

Discusses the growth, development, and unusual parasitic nature of the retrovirus community. Reviews these infectious cancer-causing agents as models for the study of fundamental biological problems, tools for genetic manipulations, and problems posed by their pathogenic potential in humans and animal hosts where they cause diseases such as…