Match the following terms and definitions. 1. replication
when both genes are dominant and both are expressed in the phenotype
2. mutation
the breeding of two organisms that have genes for two different characteristics
3. codominance
separation of DNA's two polynucleotide chains, which act as a template for a new chain
4. multiple alleles
when more than two alternatives for a gene exist
5. dihybrid cross
a copying mistake made during DNA replication