Bacteriophage FX174 contains 11 genes in a genome of 5386 bp; E. coli has a predicted 4288 genes in a genome of about 4.639 kb; S. cerevisiae has about 6000 genes in a genome of size 12.1 mb; C. elegans has about 19,000 genes present in a genome of about 100 mb; and H. sapiens has an estimated 22,000 genes in its 3000-mb genome. Which genome has the highest gene density? Which genome has the lowest gene density? Does there appear to be any correlation between gene density and developmental complexity? If so, describe the correlation.