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Below are a few major topics for this chapter. Note: these are NOT the only topics you should know; you are expected to master everything discussed in this chapter.

• Hint Genes and alleles: homozygous, heterozygous, genotype, phenotype, dominant, recessive
• Hint Mendelian inheritance
• Hint Testcross
• Hint Incomplete dominance
• Hint Codominance in ABO blood group
• Hint Nondisjunction
• Hint Sex chromosome aneuploidies
• Hint Pedigrees