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Related Concept Videos

Mate Choice01:20

Mate Choice

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Mate choice—the decision about whom to mate with—is a type of natural selection, since animals must reproduce to pass down their genes. Mate choice is also called intersexual selection because the behavior occurs between the sexes.
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Close Relationships and Culture01:29

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Culture shapes how people approach attraction, choose partners, and build long-term relationships. While some preferences in mate selection appear consistent across cultures, such as men valuing physical attractiveness and women emphasizing financial resources, cultural contexts influence how these preferences are expressed and prioritized. Marriage extends beyond romantic ideals in many societies and is deeply embedded in social, economic, and religious frameworks.The Role of Culture in Mate...
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Natural Selection and Mating Preferences01:06

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The principle of natural selection posits that organisms better adapted to their environment are more likely to survive and reproduce. This principle is closely intertwined with mating preferences, a key aspect of sexual selection, which evolutionary psychologists believe is driven by instincts to propagate one's genes. Such instincts significantly influence mating behaviors and preferences between genders.
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Fixed Action Patterns01:06

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A fixed action pattern (FAP) is a specific, hard-wired sequence of behaviors that occurs in response to an external stimulus, called a sign stimulus. The behavior is “fixed” because it is essentially unchangeable—proceeding similarly across individuals of a species every time it occurs.
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Relationship Formation02:12

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What do you think is the single most influential factor in determining with whom you become friends and whom you form romantic relationships? You might be surprised to learn that the answer is simple: the people with whom you have the most contact. This most important factor is proximity. You are more likely to be friends with people you have regular contact with. For example, there are decades of research that shows that you are more likely to become friends with people who live in your dorm,...
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Hybrid Zones02:29

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Hybrid zones are narrow regions where two closely related species interact, mate, and produce hybrids. Relative to either parent species, hybrids may possess distinct phenotypic or genetic differences that impact their survival and reproductive success. The genetic variances introduced by hybridization influence species diversity and speciation processes within the hybrid zone.
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Determination of the Mating Efficiency of Haploids in Saccharomyces cerevisiae
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Structured mating: Patterns and implications.

Ronnie Sebro1, Gina M Peloso2, Josée Dupuis2,3

  • 1Department of Radiology, University of Pennsylvania, Philadelphia, PA, United States of America.

Plos Genetics
|April 7, 2017
PubMed
Summary
This summary is machine-generated.

Spouses show significant genetic similarity due to ancestral assortative mating, not close kinship. This finding is crucial for genetic association studies and understanding heritability, especially in older generations.

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Area of Science:

  • Human Genetics
  • Population Genetics
  • Statistical Genetics

Background:

  • Genetic similarity between spouses can arise from mate choice factors like shared traits and social endogamy.
  • Spousal genetic correlations can influence genotype distributions, impacting genetic association studies.
  • Understanding spousal genetic similarity is key to accurate heritability estimates and population genetic analyses.

Purpose of the Study:

  • To investigate the extent of genetic similarity in white spouse-pairs from the Framingham Heart Study (FHS).
  • To explore the consequences of spousal genetic similarity on genotype distributions and genetic association studies.
  • To determine if observed genetic similarity is attributable to kinship or ancestral assortative mating.

Main Methods:

  • Analyzed genome-wide association (GWA) data from FHS original and offspring cohorts (N=124 and 755).
  • Utilized principal components (PCs) to delineate European and Ashkenazi Jewish ancestry clines.
  • Calculated spouse correlations for PCs, assessed Hardy-Weinberg and linkage disequilibrium, and estimated kinship.

Main Results:

  • Strong positive correlations observed between spouses for PC1 (Northern/Western to Southern European ancestry) and PC2 (Ashkenazi Jewish ancestry) in both cohorts.
  • Significant Hardy-Weinberg and linkage disequilibrium were detected, decreasing over generations, indicating reduced ancestral endogamy.
  • Spousal genetic similarity was fully explained by ancestral assortative mating after adjusting kinship estimates for genetic ancestry.

Conclusions:

  • Spousal genetic similarity in the FHS cohorts is primarily driven by ancestral assortative mating, not close biological kinship.
  • Findings highlight the importance of accounting for ancestry in genetic studies to avoid confounding kinship estimates.
  • The study underscores the impact of mating patterns on population genetic structure and heritability estimations.