Recombination: Recombination can have slightly different meanings depending on context:

  - In the context of genetic crosses (usually a dihybrid cross or a test cross), recombination refers to the phenomena where the phenotype of the F2 offspring is different than either parent (P generation). 
  - In the context of non-sister chromatids, recombination refers to crossing over (which can result in %%recombination%% in the sense of the first definition.
  - In the context of molecular biology, recombination refers to exchange of DNA between different DNA molecules, e.g., in the Cre-$lox$ system.