Traditional hybridization procedures used in plant and animal breeding very often leads to inclusion and multiplication of undesirable genes along with the desirable ones. What are the steps involved in genetic engineering to over come this limitation?

Traditional hybridisation means desired cross . In desired cross , sometimes variation may occur like incomplete dominance or the desired organism with desired features may not be achieved. What happens is in desired cross, chromosomal abberations may occur. This does not lead to formation of pure hybrid. To avoid these , rdt is used.