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Focus on Genetics
Experiment Simulations Excellence in Education Award
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Introductory Genetics Mendel's laws: homozygous and heterozygous offspring; segregation, dominance and independent assortment. Monohybrid and dihybrid crosses with interactive Punnett square and probability activities. Incomplete dominance. Sex chromosomes; sex determination and linkage; carriers. Random mating simulation develops genotype and phenotype ratios. Inbreeding experimentation shows the probability of a harmful gene being expressed. Kangasaurus-Transmission Genetics An advanced simulation that provides an open framework for discovering and mastering genetics. Students design a genetic system, manipulate variables, observe the effects and predict the outcomes of crosses to test hypotheses. Option for computer setup of genetic system for students to solve. Extensive visual images enhance reasoning and help develop new relation-ships. Variables include number of autosomes; sex chromosome system; gene type, loci and function; dominance; number of alleles; gene lethality, linkage and crossing over. Karyotypes & Genetic Disorders An interactive simulation and database provide a hands-on lab to explore human karyotypes and the genetic disorders that can be diagnosed with this technique. Features animated sequences of major types of chromosome errors. Students analyze an unknown karyotype, determine whether it is normal or not, and then locate and identify chromosome anomalies. A database of genetic disorders with search options for type of disorder, chromosome error and symptom encourages further research. Web links for further research. Natural Selection Discovering the relation between natural selection and genetics. Punnett square activities show effects of selection on gene frequencies. Polymorphism is graphically illustrated by the classic case of phenotype frequency changes in a moth population. Experiments on the effects of industrial pollution on a moth population illustrate the impact of changes in systems. Students vary gene frequencies, pollution levels and number of generations. Results are displayed on data tables and graphs. "-genetics at its most accurate, most active, most student involved." Four Programs on CD-ROM
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