For DNA markers in or near genes of neurological relevance, allelic frequencies were compared for groups of high- and low-IQ children (total sample of 86). This study adds 40 markers to the 60 already studied. Only one showed a significant association with IQ in original and replication samples. (SLD)

This paper is an introduction to behavioral genetics for researchers and practitioners in language development and disorders. It identifies essential concepts and applies behavioral genetic research to the language sciences. It suggests that more complex questions may be successfully addressed through behavioral genetic paradigms. Research needs…

Raw IQ scores do not demonstrate the bell curve created by normalized scores, even the bell-shaped distribution does not require large numbers of underlying genes. Family data support a major gene locus of IQ. The correlation between glutathione peroxidase and IQ should be investigated through molecular genetics. (SLD)

Brain size and cerebral glucose metabolic rate were determined for 10 individuals with mild mental retardation (MR), 7 individuals with Down syndrome (DS), and 10 matched controls. MR and DS groups both had brain volumes of about 80% compared to controls, with variance greatest within the MR group. (SLD)

Biotechnology, the study and application of engineering and science to improve the quality of life, can be an integral part of technology education. Numerous project ideas exist to expose students to the career possibilities of this field. (SK)

Presents a historical overview of the development of concept of linkage (collocation of genes on homologous chromosomes), and provides a perspective of the development of two opposing explanatory models of genetic linkage. Author asserts that a historical view can help students recognize that explanatory models are constructs developed over time,…

Analysis of pedigrees from parents of 69 preschool children who stuttered revealed that more male than female relatives ever stuttered but that female subjects who stuttered had more female relatives who ever stuttered than did male subjects. Segregation analyses suggest that transmission of a single major genetic locus increases the liability to…

This very brief comment on Herzog and Money (1993) concerning Klinefelter syndrome claims that the use of an antiandrogen with an individual whose endocrine status is already compromised by low levels of testosterone is inappropriate. (DB)

Discusses trends that have converged to transform our understanding of genetic and environmental influences on personality traits. Presents five main determinants of personality. (ZWH)

The use of statistical techniques by behavioral geneticists to divvy up separate genetic and environmental effects on individual traits is examined. The interactions between genes and environment and the effects that are produced between siblings are discussed. (KR)

Responses to a bereavement questionnaire completed by married couples (n=74) who had lost a child through death were analyzed. When parents' perceptions of the cause of their child's death were examined, it was found that, for females, but not males, the attribution of the death to genetic factors in the spouse was negatively correlated with…

The evolutionary paths by which the characteristic properties of sex chromosomes may have evolved are reviewed. The evolution of the X and Y chromosomes from a cosexual ancestor is discussed. (CW)

The link between science and society is examined by studying the application of evolution theories and genetics to human affairs. Described are the ways in which biological theories have been applied to social issues. (KR)

Explores the interplay between nature and nurture using antisocial behavior as the example, and discusses key genetic concepts and key environmental concepts. The final section considers the nature-nurture interaction in relation to passive, evocative, and active gene-environment correlations and calls for research into the effects of the…

Accurate and sensitive communication of cancer-risk information is important. Based on a literature review of 75 research reports, expert opinion papers, and clinical protocols, a synthesis of what is known about the communication of cancer-risk information is presented. Relevance of information to those not tested is discussed. (Author/EMK)