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Modern Genetic Analysis Chapter 2. The Structure of Genes and Genomes The Nature of Genes
Table 2-1. The Relationship Between Gene Size and mRNA Size

Species | Average exon number | Average gene length (kb) | Average mRNA length (kb)

Hemophilus influenzae | 1 | 1.0 | 1.0
Methanococcus jannaschii | 1 | 1.0 | 1.0
S. cerevisiae | 1 | 1.6 | 1.6
Filamentous fungi | 3 | 1.5 | 1.5
C. elegans | 4 | 4.0 | 3.0
D. melanogaster | 4 | 11.3 | 2.7
Chicken | 9 | 13.9 | 2.4
Mammals | 7 | 16.6 | 2.2

SOURCE: Based on B. Lewin, Genes 5, Table 2-2. Oxford University Press.

© 1999 by W. H. Freeman and Company. All rights reserved.