How big is the Drosophila genome? How many genes does it have?
The genome sequence (Release 1.0) is described in Adams et al. 2000. The genome is estimated to be 180 Mb: 120 Mb of euchromatin and 60 Mb of unclonable heterochromatin. Scaffolds containing 116.2 Mb of sequence from the whole genome shotgun sequence map to chromosome arms, and scaffolds containing 3.8 Mb are unmapped. Some of the latter belong to the Y chromosome. The approximate sizes of the chromosome arms were determined by summing the sequence and the estimated gap sizes. Fig. 1, Adams et al.
