
Relationship between gene copy number and gene expression. (A) Expression levels for genes duplicated in only one line in lines not carrying the duplication and in lines carrying heterozygous and homozygous duplications. (B) An increase in gene copy number is associated with an increase in the expression levels of Prosbeta5R2. The ancestral diploid state for this gene is two copies and its copy number can be as high as six in lines carrying three homozygous duplications.











