During this period of relaxed selection, duplicate genes either find new roles (neofunctionalize), partition ancestral roles (subfunctionalize) or accumulate deleterious mutations and decay as pseudogenes.
Changes in expression levels have to be mediated by changes in either production or decay rates, and the literature contains several specific examples of noncoding mutations affecting for instance production rates [42], mRNA processing rates [43], [44], the shape of the cis-regulatory input function [45], [46], [47] and mRNA decay rates [48], [49], [50].
Shape perturbations may either grow or decay.
Make it sprout -- or decay.
As radon itself decays, it produces new radioactive elements called radon daughters or decay products.
Second, greater buffering, by reducing the intensity of natural selection acting on the direct characters, allows greater accumulation of mutations that decay performance of the direct characters.
Our results suggest that few recessive mutations drive decay of female sexual traits, at least in asexual species deriving from haplodiploid sexual ancestors.
Nonsense mutations or deletions and insertions that result in interruption of the reading frame, nonsense-mediated mRNA decay and a null-allele.
The decay function is therefore sometimes loosely discussed as if it depended only on deleterious mutations (or only deleterious and neutral mutations).
However, the Q123A and Q123V mutations significantly decelerated decay of the O photointermediate.
