Upon successful completion of this unit, you will be able to:

  • explain how information flows from genotype to phenotype at the molecular level;
  • explain how we use the terms genotype, phenotype, homozygous, heterozygous, dominant, recessive, co-dominant, and sex-linkage;
  • infer whether the trait in a pedigree diagram is dominant or recessive, and indicate individual genotypes when possible;
  • solve genetic problems involving monohybrid crosses with dominant and recessive traits, codominant traits, and sex-linked traits;
  • solve genetic problems involving dihybrid crosses with dominant and recessive traits, codominant traits, and sex-linked traits; and
  • define mutation and explain how a mutation, such as that in sickle cell, can result in a changed phenotype.