2. Mendel’s experiments only looked at traits in which only one of the alleles is expressed COMPLETE DOMINANCE

3. F1 x F1 Second Generation (F2) Homozygous dominant = purple Homozygous recessive = white Heterozygous = lavender

4. Mendel’s experiments only looked at traits in which only one of the alleles is expressed COMPLETE DOMINANCE Incomplete dominance: a situation where neither allele dominates the other and both exercise an influence on the individual; results in partial expression of both traits.

5. F1 x F1 Second Generation (F2) Homozygous dominant = purple Homozygous recessive = white Heterozygous = purple and white speckled

6. Mendel’s experiments only looked at traits in which only one of the alleles is expressed COMPLETE DOMINANCE Incomplete dominance: a situation where neither allele dominates the other and both exercise an influence on the individual; results in partial expression of both traits. Codominance: A situation where both alleles are expressed fully to produce offspring with a third phenotype

7. White (recessive) Red (dominant) Roan

9. Multiple Alleles- ABO Blood Types Blood GroupAntigen AHas only A antigen on red cells (and B antibody in the plasma) BHas only B antigen on red cells (and A antibody in the plasma) ABHas both A and B antigens on red cells (but neither A nor B antibody in the plasma) OHas neither A nor B antigens on red cells (but both A and B antibody are in the plasma) There are 4 major blood groups determined by the presence or absence of two antigens (A and B) on the surface of red blood cells: