The sequencing of the human genome lead to the realization that chromosome 19 contains many genes while chromosomes 13 and Y contain relatively few.This finding implies what about the density of genes in a genome?

A)Genes are uniformly distributed throughout the genome.
B)Genes are not uniformly distributed and appear in clusters separated by large noncoding regions.
C)Genes are uniformly distributed on chromosomes but not through the entire genome.
D)Genes have no organization and randomly appear throughout the genome and chromosomes.