although the completion of the human genome project was celebrated in April 2003 and sequencing of the human chromosomes is essentially 'finished', the exact numver of genes encoded by the genome is still unknown. october 2004 findings from the international human genome sequencing consortium, reduced the estimated number of human protien-coding genes from 35 000 to only 20 000 to 25 000, a surprising low number for our species.

Why do you think the number of genes in the human genome was over estimated?