Genes known to accumulate
mutations at a constant rate, much like a ticking clock, can be used to determine when a species originated.
Not exact matches
@ED The only thing that is assumed to be
at least more or less
constant in evolutionary theory is the
mutation rate of individual genes, and even that, since
mutations are known, eg, to increase under higher radiation, is only true «on average, over the long run».
DT40 has with 1.3 × 10 − 5
mutations / bp / generation [14] a high and stable
mutation rate at the immunoglobulin light chain locus, guaranteeing
constant diversification of any gene cloned into this region.