Genome size is the total number of DNA base pairs in one copy of a haploid genome. The genome size is positively correlated with the morphological complexity among prokaryotes and lower eukaryotes; however, after mollusks and all the other higher eukaryotes above, this correlation is no longer effective. This phenomenon also indicates the mighty influence coming from <answer>repetitive DNA</answer> act on the genomes.
What accounts for the breakdown of the relation between genome size and morphological complexity in higher eukaryotes?
repetitive DNA