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

I'm assuming we have to match the correct terms/definitions...

1. replication - separation of DNA's two polynucleotide chains, which act as a template for a new chain

2. mutation - copying mistake make during DNA replication

3. codominance - when both genes are dominant and both are expressed in the phenotype.

4. multiple alleles - when more than two alternatives for a gene exist

5. dihybrid cross -the breeding of two organisms that have genes for two different characteristics.