1. What you should remember from Genetics Presented by: Deoxyribonucleic Awesome AKA: Justine, Deonna, Anam and Raquel

2. Overview:  Pedigrees  Genotypes/Phenotypes  Types of Dominance  Relation to Bio 112

3. Genotypes and Phenotypes: Differences?  Genotype: The genetic makeup, or set of alleles, of an organism  Geno.: Pheno.:  DD, Ddblue fish (dominant)  Ddred fish (recessive)  Phenotype: The observable traits of an organism

4. Types of Dominance  Complete dominance: One allele is completely dominant over the other.  Example: If one parent has brown eyes (BB) and the other parent has blue eyes (bb), the offspring will have brown eyes.  Allele Contribution to Phenotype  B Brown eyes (dominant)  b Blue eyes (recessive)  Genotype Phenotype  BB Brown eyes (dominant)  Bb Brown eyes (dominant)  bb Blue eyes (recessive)

5. Incomplete Dominance:  When two alleles together produce a third phenotype  Ex. Flower colors:  A red flower (RR) and a white flower (rr) will produce a pink flower (Rr).  Allele Contribution to Phenotype  R Red (incomplete dominance)  r White (incomplete dominance)  Genotype Phenotype  RR Red  Rr Pink (intermediate between red and white)  rr White

6. Co-Dominance:  When both alleles express themselves  Example:  Genotype Phenotype  I^A I^A Type A  I^BI^B Type B  ii Type O  I^A i Type A  I^B i Type B  I^AI^B Type AB

7. Relation to Bio 112:  Evolution  Hardy-Weinberg Principle (p + q = 1)