Which of the following statements about cross-breeding is not correct?

The statement that is not correct is "the individuals used in cross-breeding have all characters in common". Cross-breeding is the process of breeding two different individuals of the same species with different characteristics or traits to obtain offspring with a combination of desirable traits from both parents. Therefore, the individuals used in cross-breeding have different traits, and the cross-bred progenies are usually heterozygous, meaning they carry two different alleles of the same gene. Cross-breeding can be used to introduce new genes, create new breeds of livestock, and is a routine practice of improving poultry.