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Related Concept Videos

Human Genetics01:28

Human Genetics

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Human genetics provides a profound framework for understanding the interplay between genetic predispositions and human psychology. At the heart of this discipline lies the study of how genes influence physical traits, behaviors, and susceptibility to diseases. Each person carries a unique genetic code that subtly or significantly shapes their psychological and behavioral landscape.
The complex relationship between genetics and psychology is observable through common biological components such...
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Hardy-Weinberg Principle01:49

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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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Genetic Variation01:25

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.
Genes exist in different versions called alleles,...
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What is Population Genetics?01:25

What is Population Genetics?

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A population is composed of members of the same species that simultaneously live and interact in the same area. When individuals in a population breed, they pass down their genes to their offspring. Many of these genes are polymorphic, meaning that they occur in multiple variants. Such variations of a gene are referred to as alleles. The collective set of all the alleles within a population is known as the gene pool.
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Genome-wide Association Studies-GWAS01:11

Genome-wide Association Studies-GWAS

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Genome-wide association studies or GWAS are used to identify whether common SNPs are associated with certain diseases. Suppose specific SNPs are more frequently observed in individuals with a particular disease than those without the disease. In that case, those SNPs are said to be associated with the disease. Chi-square analysis is performed to check the probability of the allele likely to be associated with the disease.
GWAS does not require the identification of the target gene involved in...
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Incomplete Dominance01:43

Incomplete Dominance

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Gregor Mendel's work (1822 - 1884) was primarily focused on pea plants. Through his initial experiments, he determined that every gene in a diploid cell has two variants called alleles inherited from each parent. He suggested that amongst these two alleles, one allele is dominant in character and the other recessive. The combination of alleles determines the phenotype of a gene in an organism.
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A Strategy to Identify de Novo Mutations in Common Disorders such as Autism and Schizophrenia
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A multi-ancestry genetic reference for the Quebec population.

Peyton McClelland1, Georgette Femerling2, Rose Laflamme3,4

  • 1Department of Human Genetics, McGill CERC Program in Genomic Medicine, Victor Phillip Dahdaleh Institute of Genomic Medicine at McGill University, 740 Av. du Docteur-Penfield, Montreal, Quebec, H3A 0G1, Canada.

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Summary
This summary is machine-generated.

This study analyzes genetic variation in 29,337 Quebec residents from the CARTaGENE cohort, revealing insights into population demographics and improving the discovery of phenotype-genotype associations through genome-wide association studies (GWAS). Data is publicly available for research.

Keywords:
CARTaGENEQuebecSPG7founder populationgenotype imputation

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Area of Science:

  • Genomics
  • Population Genetics
  • Bioinformatics

Background:

  • International genetic studies often overlook environmental, social, and cultural factors.
  • Quebec has a history of genetic studies, particularly on founder populations and Mendelian diseases.
  • Understanding genetic variation within diverse populations is crucial for interpreting health implications.

Purpose of the Study:

  • To profile and analyze genome-wide genetic variation in a large Quebec population cohort (CARTaGENE).
  • To investigate Quebec's demography and interpret the significance of genetic variants.
  • To enhance the discovery of phenotype-genotype associations using a custom imputation panel.

Main Methods:

  • Genome-wide genotyping and whole-genome sequencing of 29,337 and 2,173 CARTaGENE participants, respectively.
  • Phasing whole-genome sequence data to create a population-specific imputation panel.
  • Conducting genome-wide association studies (GWAS) to identify phenotype-genotype associations.

Main Results:

  • Detailed profiling of genome-wide genetic variation in the CARTaGENE cohort.
  • Demonstrated improvement in phenotype-genotype association discovery using the custom imputation panel.
  • Generated allele frequency information and GWAS results, made publicly available.

Conclusions:

  • The study provides valuable genetic and phenotypic data for understanding Quebec's population structure and health.
  • The developed imputation panel significantly enhances genetic association studies in this population.
  • The publicly accessible data and results facilitate further research into genotype-phenotype relationships.