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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 single nucleotide polymorphism or SNP is a single nucleotide variation at a specific genomic position in a large population. It is the most prevalent type of sequence variation found in the human genome. Point mutations that occur in more than 1% of the population qualify as SNPs. These are present once every 1000 nucleotides on an average in the human genome. Replacement of a purine with another purine (A/G) or a pyrimidine with another pyrimidine (C/T) is known as a transition. In contrast,...
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Human disease genes.

G Jimenez-Sanchez1, B Childs, D Valle

  • 1Department of Pediatrics, McKusick-Nathans Institute of Genetic Medicine, Johns Hopkins University School of Medicine, Baltimore, Maryland 21205, USA.

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|March 10, 2001
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Summary
This summary is machine-generated.

Functional classification of nearly 1,000 human disease genes reveals correlations between gene product function and disease characteristics like inheritance patterns. This approach deepens our understanding of human disease and integrates biology with medicine.

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Area of Science:

  • Genomics
  • Human Genetics
  • Disease Mechanisms

Background:

  • The complete human genome sequence provides a foundation for identifying disease-contributing genes.
  • Understanding the function of these genes is crucial for deciphering disease principles.

Purpose of the Study:

  • To functionally classify documented human disease genes.
  • To investigate correlations between gene product function and disease phenotypes.

Main Methods:

  • Functional categorization of approximately 1,000 known disease genes.
  • Analysis of relationships between gene function and disease features (e.g., age of onset, inheritance mode).

Main Results:

  • Established functional categories for nearly 1,000 disease genes.
  • Identified significant correlations between gene product function and disease characteristics.
  • Demonstrated a link between gene function and disease inheritance patterns and age of onset.

Conclusions:

  • Functional classification of disease genes offers insights into general principles of human disease.
  • Growing knowledge of disease genes, including those for complex traits, enables sophisticated analyses.
  • This research enhances the integration of medicine and biology for a deeper understanding of disease.