| A | B |
|---|
| Incomplete Dominance | One allele of a pair is not fully dominant over its counterpart (also called "intermediate inheritance"). |
| Codominance | Both alleles are expressed fully. |
| Multiple Alleles | More than two alleles for a gene are found within a population. |
| Epistasis | One gene alters the effect of another gene. |
| Polygenic Inheritance | Many genes contribute to a phenotype. |
| Gene Linkage | Genes on the same chromosome are linked and thus will not be sorted out independently of each other. |
| Sex Linkage | If a male gets a recessive (or dominant) allele on the X chromosome from his mother, he will express that trait. |
| Simple Dominance | The biological principle that recognizes that some alleles are dominant and some are recessive. |
| Intermediate Inheritance | In this inheritance pattern, heterozygotes have a phenotype intermediate between the phenotypes of the two homozygotes (also called "incomplete dominance"). |
