Based on the variation of genome size and gene number in the organisms presented

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.) genome size (bpairs) 10% 10' 10* 109 10TO Homo sapiens (hum Mus musculus (mouse) Drosophla melanogaster (fruit fly) Arabidopsis thaliana (plant) Caenorhabditis elegans (roundworm) Saccharomyces cerevisiae (yeast) Escherichia coli (bacterium) 103 10 10 approximate number of genes Select one: a. M. musculus O b. A. thaliana C. H. sapiens d' E. coli O e. C. elegans

Explanation / Answer

Answer is option D. E.coli.

Although e.coli has smaller genome, its genome has no introns bloke eukaryotes. Hence, the genes per unit length of genome is greatest in E.coli.

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