2. Co-dominant allele Both phenotypes are dominant and the phenotype shows expression of BOTH alleles together Incomplete dominance Neither phenotype is dominant. The heterozygous individual expresses a “blend” of the traits. Multiple alleles More than two different alleles are possible in the population for a given trait. (i.e. Blood grouping)

3. Polygenic inheritance The pattern of inheritance where two or more genes control a trait that represents a range of outcomes PedigreeA chart which tells all of the known phenotypes for an organism, its ancestors, and its offspring CarrierAn unaffected heterozygous organism that can pass on a recessive allele for a disorder to its offspring

4. Gene therapyInserting working copies of a gene into someone with a non-working copy so the correct protein can be made. Transgenic organism An organism whose genetic material has been altered using genetic engineering techniques

5. Restriction Enzyme An enzyme that cuts double- stranded DNA Human Genome The sequencing of the approximately 40,000 genes on the 46 chromosomes