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Related Concept Videos

Frequency-dependent Selection01:21

Frequency-dependent Selection

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When the fitness of a trait is influenced by how common it is (i.e., its frequency) relative to different traits within a population, this is referred to as frequency-dependent selection. Frequency-dependent selection may occur between species or within a single species. This type of selection can either be positive—with more common phenotypes having higher fitness—or negative, with rarer phenotypes conferring increased fitness.
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Most altruistic behavior—in which one animal helps another at a cost to themselves—occurs between relatives. Scientists think these altruistic behaviors evolved because they increase the inclusive fitness of the animal providing help.
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Diploid organisms have two alleles of each gene, one from each parent, in their somatic cells. Therefore, each individual contributes two alleles to the gene pool of the population. The gene pool of a population is the sum of every allele of all genes within that population and has some degree of variation. Genetic variation is typically expressed as a relative frequency, which is the percentage of the total population that has a given allele, genotype or phenotype.
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Behavior genetics explores how genetic inheritance influences human behavior. It focuses on how genes, passed from parents to offspring, contribute to the development of behavioral traits and tendencies. This branch of genetics seeks to understand the complex interplay between inherited genetic factors and environmental influences in shaping our behaviors.
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Simultaneous Assessment of Kinship, Division Number, and Phenotype via Flow Cytometry for Hematopoietic Stem and Progenitor Cells
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Kinship as a frequency dependent strategy.

Ting Ji1, Xiu-Deng Zheng2, Qiao-Qiao He2

  • 1Key Laboratory of Animal Ecology and Conservation Biology, Centre for Computational and Evolutionary Biology, Institute of Zoology, Chinese Academy of Sciences, Beijing 100101, People's Republic of China; Department of Anthropology, University College London, 14 Taviton Street, London WC1H 0BW, UK.

Royal Society Open Science
|March 22, 2016
PubMed
Summary
This summary is machine-generated.

Cultural norms of where couples live after marriage can change based on what others in the community do. This frequency-dependent strategy influences cultural diversity and extinction.

Keywords:
frequency-dependent selectionkinshippost-marital residence

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Area of Science:

  • Social Sciences
  • Anthropology
  • Evolutionary Biology

Background:

  • Human societies are characterized by distinct cultures and kinship norms.
  • Marital residence norms, dictating where couples live, are key societal features.

Purpose of the Study:

  • To investigate the evolution of marital residence norms as a frequency-dependent strategy.
  • To analyze cultural change in kinship using real-world data and evolutionary models.

Main Methods:

  • Utilized real-world case studies from southwestern China.
  • Employed an evolutionary game model to simulate strategy dynamics.

Main Results:

  • Demonstrated that marital residence norms can shift based on the frequency of strategies adopted by others.
  • Showed transitions between patrilocal, matrilocal, neolocal, and duolocal residence types are possible.
  • Highlighted the role of changing costs/benefits of co-residence with kin.

Conclusions:

  • Frequency-dependent selection is a significant factor in maintaining and driving cultural diversity and extinction.
  • Cultural transitions in marital residence are influenced by both environmental factors and social dynamics.