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Hardy-Weinberg Principle

Hardy-Weinberg Principle

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.In the early 20th century,...

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Genetic Variation

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Genetic variation is the diversity in DNA sequences found among individuals of the same species. This diversity is crucial for a species' survival because it helps organisms adapt to environmental changes. Genetic variation begins with fertilization, where an egg and sperm cell merge. Each of these cells carries 23 chromosomes, up to 46 in the fertilized egg. Chromosomes are long DNA strands that contain genes, the basic units of heredity.
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Genetic Drift

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Gene Flow

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Related Experiment Video

Updated: Jul 10, 2026

Following the Dynamics of Structural Variants in Experimentally Evolved Populations

Following the Dynamics of Structural Variants in Experimentally Evolved Populations

Published on: February 3, 2023

[Founder effects and genetic variability in Quebec].

Claudia Moreau¹, Hélène Vézina, Damian Labuda

¹Centre de Recherche, CHU Sainte-Justine, 3175, chemin de la Côte Sainte-Catherine, Montréal, Québec, H3T 1C5, Canada.

Medecine Sciences : M/S

|November 21, 2007

Summary

This summary is machine-generated.

Quebec

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Area of Science:

Population genetics
Genetic epidemiology

Context:

The Quebec population, primarily of French descent, is a young founder population valuable for genetic studies.
Previous founder effect assessments focused on specific diseases and regions, potentially introducing clinical bias.

Purpose:

To investigate Quebec's genetic diversity beyond clinical observations.
To analyze neutral genetic markers across different regional populations to understand founder effects.

Summary:

Quebec's genetic makeup is comparable to European populations, not significantly more homogeneous.
Regional founder effects are evident, especially in rare genetic variants, stemming from historical migration patterns and isolation.
Interactions with Indigenous populations and later migrants also influence contemporary genetic diversity.

Impact:

Provides a broader understanding of Quebec's genetic landscape, moving beyond disease-specific studies.
Highlights the importance of regional analyses in founder populations to capture nuanced genetic diversity.
Informs future genetic studies and epidemiological research in Quebec and similar founder populations.