The relationship of genotype to phenotype is rarely as simple as the dominant and recessive ... simultaneously demonstrates both phenotypes. An example of codominance occurs in the human ABO ...

Alleles are different forms of the same gene, for example blue and brown are both alleles of the eye colour gene. Similar genes occupy the same position on both chromosomes in the pair.

For example, can the alleles for the body color gene (brown and black) be mixed and matched in different combinations with the alleles for the eye color gene (red and brown)? The simple answer to ...