Complete dominance is when the F1 offspring look like one of the two parents. Incomplete dominance is when neither allele for a gene is completely dominant over the other which leads to a phenotype...
A good example of incomplete dominance is the color of Japanese 4 o'clock flowers. A red Japanese 4 o'clock will have the genotype RR. A white Japanese 4 o'clock will have the genotype WW.
When...