Perform uniform crossovers between the genomes of two organisms.

Example::

| genome 1 --       A B C D E F G
|                   .   . .   .
| genome 2 --       a b c d e f g
|
| After crossover:
|
| new genome 1 --  a B c d E f G
| new genome 2 --  A b C D e F g

Uniform Crossover is a standard crossover technique for rapid mutation-behavior.