Biology and biotechnology are increasingly ubiquitous and genome research will define the 21st century as the century of biology (Venter & Cohen, 2004). Comprehension of biology is needed to engage with major public policy issues and to make informed decisions (Barton & Uphadyay, 2010; Ladson-Billings, 2003; NRC, 2012; Walker, 2021).…

Learning progressions (LPs) are hypothetical models of how learning in a domain develops over time with appropriate instruction. In the domain of genetics, there are two independently developed alternative LPs. The main difference between the two progressions hinges on their assumptions regarding the accessibility of classical (Mendelian) versus…

The author developed three instruments which operationally defined certain probability concepts and combinatorial abilities and subsequently used the instruments to classify the 90 subjects of the study according to their conceptual strategies or ability levels. The subjects were high school biology students from one school; all were taught by the…

Examines various types of problems that researchers have used to demonstrate problem solving. Focuses on genetics problems. Discusses classes of learning outcomes, conceptual knowledge gains, content-independent heuristics, content-specific procedures, understanding the nature of science and a typology of genetics problems. (CW)