The pamphlet, written for physicians and other health professionals who counsel parents, explain five factors which put women at high risk of giving birth to a child with Down's Syndrome and three antenatal diagnostic techniques. Five factors identified as indicating high risk are advanced maternal age (over 40 years old), a previous child with…

This biogeography module is designed for students wishing to study evolutionary interrelationships with the physical environment. Topics studied include various aspects of historical biogeography and evolution. Categories included are: (1) barriers to the dispersal or organisms, (2) the zoogeographic regions, (3) genetic change, (4) selection, and…

Ninety students were randomly selected from students enrolled in a college general biology course and assigned randomly to two groups working in audio-tutorial laboratories. The "direct" group was taught by audio-taped lectures, laboratory exercises, and guide sheets that were primarily expository and descriptive; the…

The discussion of genetic and environmental factors in the growth of children from infancy to adolescence focuses on intrauterine life, the effects of nutrition, hormones, illness, and emotion in the childhood years, and obesity and puberty in adolescents. Described are processes, such as amniocentesis, for monitoring the physiology chemistry of…

Presents a simple pedagogical model to teach the importance of antiparallel complementarity in nucleotide pairing when replication, transcription and coding are initially introduced. (HM)

Presents an attempt to explore plant chimeras and to demonstrate the separation of genetically distinct tissue in a chimera using an easily grown scented geranium plant. (HM)

The article explains diabetes mellitus, giving a brief history of the disease, its description, complications, and treatment. (PHR)

Harvard scientists were planning DNA experiments which required special facilities. A citizen panel was formed to look into the adequacy of federal safety guidelines for the community. Describes the review process and discusses the concept of a citizen court to resolve such technical controversies. (GA)

Discusses public policy formation concerning the recombinant DNA controversy. Compares this issue with the case of atomic energy in 1946. (MA)

Early mental development of twins and siblings is analyzed, from an evolutionary viewpoint and related to the interplay of genetic programing, maturational status, and environmental influence. (MP)

Examines the role of sociobiology in explaining human behavior. Recommends that sociobiologists consider both biogenetics (DNA and information coded in the genes) and noogenetics (process by which learned structures are transmitted from one generation to the next). (Author/DB)

Sociobiology, although in its formative stage, is the most promising paradigm for bridging the gap between biology and the social sciences. (Author/AM)

Chromosomal abnormalities, some appearing in a stepwise clonal evoluation, were found in five Down's syndrome patients (35 weeks to 12 years old), four with acute leukemia and one with abnormal regulation of leukopoiesis. (Author/SBH)

Presented is the prepared text of a public lecture given by the president of the National Academy of Sciences. Dr. Handler attempts to articulate the state of science today. He deals with such issues as nuclear power and genetic engineering. (MDR)