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This activity helps students to understand basic principles of genetics, including relationships of genotype to phenotype, concepts of recessive and dominant alleles, and how understanding meiosis and fertilization provides the basis for understanding inheritance, as summarized in Punnett squares. The Student Handout includes an analysis of the inheritance of albinism that teaches all of these concepts, a Coin Toss Genetics activity that helps students understand the probabilistic nature of Punnett square predictions, and an analysis of the inheritance of sickle cell anemia that reinforces the basic concepts and introduces some of the complexities of genetics. The Genetics Supplement includes two additional activities, an analysis of student data on the sex makeup of sibships and pedigree analyses of recessive and dominant alleles with challenge questions that introduce the role of mutations and an evaluation of Punnett squares and pedigrees as models of inheritance.
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