Grade 1 literacy skills of twin children in Australia (New South Wales) and the United States (Colorado) were explored in a genetically sensitive design (N = 319 pairs). Analyses indicated strong genetic influence on word and nonword identification, reading comprehension, and spelling. Rapid naming showed more modest, though reliable, genetic…

Conducted in urban and rural schools in two provinces of South Africa, the present study reports biology learners' understanding of concepts about genetics and inheritance. Participants were Grade 11 and 12 learners, aged 15-16 years. The tools included a written questionnaire, interviews, pre- and post-paper and pencil tests and focus group…

Background: Strong evidence from twin and family studies suggests that the genetic liability to autism may be expressed through personality and language characteristics qualitatively similar, but more subtly expressed than those defining the full syndrome. This study examined behavioral features of this "broad autism phenotype" (BAP) in relation…

Type 2 diabetes mellitus is reaching epidemic proportions among children and adolescents. School health fairs offer an opportunity to identify children with risk factors for the development of type 2 diabetes mellitus. This study identified selected risk factors (i.e., high-risk racial/ethnic group, obesity, elevated blood pressure, elevated…

Turner syndrome, a genetic disorder that affects only females, can cause various physical, emotional, and educational disabilities. This disorder may go undiagnosed until school age or later. Short stature and lack of spontaneous puberty are common characteristics and can lead to teasing by peers. Some experience attention deficit and the…

Williams syndrome, a genetic disorder caused by a microdeletion of approximately 25 genes on chromosome 7q11.23, is associated with mild to moderate intellectual disability or learning difficulties. Most individuals with Williams syndrome evidence a cognitive profile including relative strengths in verbal short-term memory and language, and…

It seems hard to believe that Dolly the cloned sheep was born 10 years ago, kindling furious arguments over the prospects and ethics of cloning a human. Today, the controversy over cloning is entwined, often confused, with concerns over the use of human embryonic stem cells. Most people are unclear what cloning is, and they know even less when it…

This literature review, from 1990 to the present, discusses the characteristics of autism and the comorbidity of mental retardation and autism. Specific medical syndromes that complement the heterogeneity concept are described, including epilepsy, fragile X syndrome, Rett syndrome, tuberous sclerosis, and Asperger syndrome. The paper presents some…

The term "statistical significance" is often misunderstood or abused to imply a large effect size. A recent example is in the work of J. P. Rushton (1988, 1990) on differences between Negroids and Caucasoids. Rushton used brain size and cranial size as indicators of intelligence, using Pearson "r"s ranging from 0.03 to 0.35.…

This poster reports on a study attempting to distinguish between the influences of domain-specific and domain-general developmental mechanisms in subjects with Williams Syndrome (a genetic defect resulting in mental retardation). Subjects included 10 monolingual French-speaking subjects (ages 9-21) with Williams syndrome and 10 monolingual…

This booklet presents information regarding the history, incidence, and effects of Down Syndrome. The first chapter, presenting an historical perspective of the condition, provides information on counseling parents of Down Syndrome children, and the chromosome structures seen in Down Syndrome patients. The next chapter discusses medical aspects in…

Student knowledge in a subject area prior to and after instruction has traditionally been assessed by administering a pre- and post-test, usually multiple choice, though recent studies criticize the use of even the best-constructed multiple choice tests. This study assessed college freshmen's knowledge before and after a laboratory experience in…

An integral part of the curriculum in introductory biology courses is the study of Mendelian genetics. Results from genetics learning studies and needs assessments demonstrated the need for additional intensive research in biology education and genetics learning. There exists a lack of detailed information describing reasoning patterns and…

The relationship between classroom work and student understanding of genetics content is examined in this descriptive study of an introductory high school biology class. Classroom observations and examnations of student assignments related to a genetics unit were made. Factors affecting the teacher's management of the work system and the apparent…

This syllabus has been developed as an alternative to Regents biology and is intended for the average student who could benefit from an introductory biology course. It is divided into seven major units dealing with, respectively: (1) similarities among living things; (2) human biology (focusing on nutrition, transport, respiration, excretion, and…