An Upper Limit on the Functional Fraction of the Human Genome

Bibliographic Collection: 
Publication Type: Journal Article
Authors: Graur, Dan
Year of Publication: 2017
Journal: Genome Biology and Evolution
Volume: 9
Issue: 7
Pagination: 1880 - 1885
Date Published: 2017/07/01
Publication Language: eng

For the human population to maintain a constant size from generation to generation, an increase in fertility must compensate for the reduction in the mean fitness of the population caused, among others, by deleterious mutations. The required increase in fertility due to this mutational load depends on the number of sites in the genome that are functional, the mutation rate, and the fraction of deleterious mutations among all mutations in functional regions. These dependencies and the fact that there exists a maximum tolerable replacement level fertility can be used to put an upper limit on the fraction of the human genome that can be functional. Mutational load considerations lead to the conclusion that the functional fraction within the human genome cannot exceed 25%, and is probably considerably lower.



Short Title: Genome Biology and Evolution