Category Archives: societal structure

Societal constructs, and Genetic diversity

While we grapple with numerous discoveries of variation in genomic diversity in humans, interest has subsequently risen in understanding their causes/results. Two recent papers describe experiments to determine (a) the effects of marital rules (who gets to marry whom) on … Continue reading

Share
Posted in evolution, genomics, natural history, population genetics, selection, societal structure | Tagged , , , , , , , | Leave a comment

Quantifying risks of consanguineous mating in humans

The efficacy of selection in purging a deleterious mutation from a randomly mating population depends on numerous factors, including dominance effects of alleles – see my previous posts. Simplistically, most new mutations are expected to be heterozygotic, and be purged … Continue reading

Share
Posted in genomics, mutation, pedigree, population genetics, selection, societal structure | Tagged , , , , | Leave a comment

Live fast and reproduce young

Here is one for the “simple, elegant science” folder: a new paper in PNAS by Julia Schroeder and colleagues that demonstrates a fitness disadvantage in offspring from older parents. While there a multitude of papers out there showing that gametes have … Continue reading

Share
Posted in pedigree, population genetics, societal structure | Tagged , | Leave a comment

How (not) to review papers on inclusive fitness

There are few evolutionary concepts as polarizing as Hamilton’s rule. Some researchers feel that there is no mathematical grounding for it, while others beg to differ. Yet empirical evidence in support of Hamilton’s rule is scarce (but check out this … Continue reading

Share
Posted in adaptation, population genetics, societal structure, theory | Leave a comment

The genetics of another multi-level society

Long-time readers (i.e., “for more than one week”) of The Molecular Ecologist will notice that this is the 2nd post on the socio-genetics of a primate multi-level society. The first being Melissa’s post last week that covered my recent paper … Continue reading

Share
Posted in pedigree, societal structure | Tagged | Leave a comment

All in the family: hierarchical social and genetic structure in the Old World monkey Theropithecus gelada

Complex, multi-level animal societies have evolved convergently across many taxa but we know little about the mechanisms behind their formation and their associated fitness benefits. In their Molecular Ecology paper published online last week, Snyder-Mackler et al. addressed these questions … Continue reading

Share
Posted in community, Molecular Ecology, the journal, primates, societal structure | 2 Comments