Study suggests genetic drift is plausible explanation for modern human developmentJacquelyn Flatt
explanation, account - a statement that makes something comprehensible by describing the relevant structure or operation or circumstances etc.; "the explanation was very simple"; "I expected a brief account" contextual definition - a definition in which the term is used by embedding it in a large...
34. However, it is becoming increasingly clear that variation in mt diversity largely reflects selective processes and variation in mt mutation rates35rather than the rate of genetic drift36,37. In groups with Z/
Under a simple allopatric speciation model, drift alone requires 9–12 Ne (effective population size) generations to make incipient species reciprocally monophyletic at more than 95% of loci (Hudson and Coyne, 2002). Therefore, species with long generation times, such as coniferous trees, or ...
In comparison to larger populations, small populations are more influenced by demographic and environmental stochasticity [13,14,15,16]. Over time, small populations are expected to show increased rates of genetic drift leading to reduced genetic variation and lower adaptive potential [17]. However,...
How is gene flow related to genetic drift? What is an autosomal inheritance? Explain how the passage of genes from parents to offspring, in the form of alleles, ensures perpetuation of parent traits in offspring and, at the same time, genetic variation among offspring. Use genetic terms in ...
What is the difference between genetic drift and mutation? What type of mutation is the sickle hemoglobin mutation? What chromosome has the genetic mutation for cystic fibrosis? What genetic metabolic phase causes gene mutation? What chromosome has the genetic mutation for schizophrenia?
The mutations that caused phenotypically visible differences were purged by strong pressure, whereas those that did not affect the phenotype were free from selection and accumulated in populations through mutation-drift balance. Therefore, the genetic variations that did not contribute to the phenotypes ...
while the gene flow/drift equilibrium model (referred to as the gene flow model) relates to a balance between the two forces. The drift model assumes that mutation has not strongly influenced gene frequencies such that alleles are identical by descent, and the gene flow model assumes that the...
(Fig.4C) and the selective forces related to climatic changes in North Africa allowed genetic differentiation to arise and then be reinforced by genetic drift due to limited gene flow among different domains of the species distribution. First, MaxEnt models suggest that today’s European and ...