Presented is the case history of a boy with a previously unreported pattern of upper limb deformities and minor craniofacial anomalies. (DB)

Presents a few pertinent facts related to contrasting conditions in Mendel's experiment. The lack of emphasis regarding normal vs abnormal conditions or the origins of the abnormal type is questioned. Suggested contrasts are given. (EB)

Paper presented at the Merrill-Palmer Institute on Research and Training of Infant Development (Detroit, Mich., Feb. 15-17, 1968).

To account for observed sex differences on tasks such as the rod and frame test, the embedded figures test, and other related measures, the theory is advanced that a sex-linked recessive gene mediates or facilitates certain performances. This assumption is coupled with the concept of "a mixture of density functions" to provide a…

INTELLIGENCE IS COMPOSED OF SIX INDEPENDENT ABILITIES--NUMERICAL, SPATIAL, REASONING, TWO VERBAL ABILITIES (VOCABULARY SIZE AND WORK FLUENCY), AND MEMORY. THE INDEPENDENCE OF THESE ABILITIES ARE EXPLORED BY RESEARCH STUDIES WHICH ARE DISCUSSED IN SIX CRITERIA CATEGORIES--(1) DIFFERENTIAL PREDICTION OF SUCCESS, (2) FACTOR STABILITY ACROSS AGE…

Designed primarily for parents of children with genetic disorders, the booklet provides information about parent groups. Part 1 describes parent groups, including organization, types of groups, and methods of outreach. A sample letter of invitation to attend a parent group and an outline of the initial meeting is included along with a list of…

Presented are two papers from a panel discussion on prenatal diagnosis and genetic counseling with families. D. Blackston (director of the Developmental Evaluation Clinic, Decatur, Georgia) points out that a concise family history, pregnancy and birth data, developmental history, careful physical examination, and appropriate laboratory studies are…

The role of genetic factors in infant response to redundancy was evaluated through observation of the behavior of three sets of same-sex fraternal twins and six sets of same-sex identical twins to combinations of redundant proprioceptive and auditory stimulation. The twins ranged in age from 6 weeks to 24 weeks. One member of each twin set was…

In this article a philosophy teacher looks at some of the questions raised by the concept of evolution and what biologists have said about them throughout the ages. (BB)

There are some important similarities between biological and societal evolution, but these similarities should not blind the enormous differences between them. Each system must be analyzed on its own merits and according to its own peculiar properties and principles. (Author/AM)

There is no clearly defined, universally accepted evolutionary theory that social anthropologists must accept. There has been great progress in the understanding of genetic mechanisms, but there are still major controversies. The most fundamental problem comes from postulating genes to account for behaviors. (Author/AM)