Allele

{
  "id": "MLC-T-ENV-001077",
  "term": "Allele",
  "field": "Environment",
  "definition": "1. One of several alternative forms of a gene that differs from other forms by a mutation in the DNA sequence.\n\n2. An alternative form of a gene or any other segment of a chromosome.\n\n3. Alternative form of a genetic locus; a single allele for each locus is inherited from each parent (e.g., at a locus for eye color the allele might result in blue or brown eyes).\n\n4. An allele is one of two or more versions of a gene. An individual inherits two alleles for each gene, one from each parent. If the two alleles are the same, the individual is homozygous for that gene. If the alleles are different, the individual is heterozygous. Though the term \"allele\" was originally used to describe variation among genes, it now also refers to variation among non-coding DNA sequences.",
  "references": [
    "EPA Genetic Diversity as an Indicator of Ecosystem Condition and Sustainability Glossary at http://www.epa.gov/eerd/Glossary-%20Genetic%20Diversity.pdf",
    "EPA Potential Implications of Genomics for Regulatory and Risk Assessment Applications at http://www.epa.gov/osa/pdfs/EPA-Genomics-White-Paper.pdf",
    "DOE Human Genome Project Information, Genome Glossary",
    "NIH Genetics Home Reference Glossary"
  ],
  "url": "https://mlchart.com/terminology/environment/allele/"
}