However, no single haploid chromosome set defines even the DNA of a species. Because of the huge variety of alleles carried by a population, every individual is genetically different. Even a diploid individual carries genetic variety. For that reason Dobzhansky preferred "set of chromosomes", and the definition now must be broader than Winklers' definition. The genome of a haploid chromosome set is merely a "sample" of the total genetic variety of a species.