Based on the variation of genome size and gene number in the organisms presented in the following graph, which organism has the highest number of genes per unit length of their genome? (Note the logarithmic scale.)
A) H. sapiens
B) M. musculus
C) A. thaliana
D) C. elegans
E) E. coli

Question

Based on the variation of genome size and gene number in the organisms presented in the following graph, which organism has the highest number of genes per unit length of their genome? (Note the logarithmic scale.) 
A) H. sapiens 
B) M. musculus 
C) A. thaliana 
D) C. elegans 
E) E. coli

Quizplus · Accepted Answer

E. coli has the highest ratio of gene number to genome size among the organisms shown in the graph. The lowest ratio belongs to H. sapiens. The ratio for each organism corresponds to the linear difference in the length of the red and blue bars for that organism. If the graph was not drawn in logarithmic scale, this comparison might not have been as straightforward.

Based on the Variation of Genome Size and Gene Number