/**
* It crosses a real allele within two parents. If the representation is a ternary representation,
* a crossover within intervals is not possible because there is only one gene in each position.
* So, in this case, the gene of the second parent will be copied. In case of being a real
* representation, a random number is generated to decide where to cross the interval. It it's
* crossed within the inteval, the crossAllele method will do it.
*
* @param parent1 is the first parent classifier.
* @param parent2 is the second parent classifier.
*/
public void crossAllele(int i, Classifier parent1, Classifier parent2) {
rep.crossAllele(i, parent1.rep, parent2.rep);
} // end crossAllele
