Answer;
Crossing over of homologous chromosomes during meiosis.
Parents can pass on chromosomes to their children that are different than their own when the new gene combinations are created by Crossing over of homologous chromosomes during meiosis.
Step-by-step explanation;
Meiosis is a type of cell division in which a parent cell divides into four daughter cells that are haploid (one set of chromosome).
During meiosis there is genetic variation as a result of cross over and recombination between homologous chromosomes.