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  1. Gene - Wikipedia

    We define a gene as a DNA sequence that is transcribed. This definition includes genes that do not encode proteins (not all transcripts are messenger RNA). The definition normally excludes regions of …

  2. What Is a Gene? - Cleveland Clinic

    Jul 9, 2025 · Genes are segments of DNA that give your cells instructions for specific traits or body functions. Different versions of the same gene are called alleles.

  3. Gene | Definition, Structure, Expression, & Facts | Britannica

    2 days ago · gene, unit of hereditary information that occupies a fixed position (locus) on a chromosome. Genes achieve their effects by directing the synthesis of proteins. In eukaryotes (such as animals, …

  4. Gene

    2 days ago · The gene is considered the basic unit of inheritance. Genes are passed from parents to offspring and contain the information needed to specify physical and biological traits.

  5. Genetics Basics | Genomics and Your Health | CDC

    Genes are specific sections of DNA that have instructions for making proteins. Proteins make up most of the parts of your body and make your body work the right way. You have two copies of every gene. …

  6. What are DNA and Genes?

    Contained within the 3 billion letters of the human genome are about 21,000 genes. Most of our known genes code for proteins, but some code for RNA molecules. All humans have the same genes …

  7. What is a gene?: MedlinePlus Genetics

    May 21, 2024 · What is a gene? A gene is the basic physical and functional unit of heredity. Genes are made up of DNA. Some genes act as instructions to make molecules called proteins, which are …

  8. What Is Genetics? - National Institute of General Medical Sciences

    Apr 8, 2024 · A gene is a segment of DNA that contains instructions for building one or more molecules that help the body work. Researchers estimate that humans have about 20,000 genes, which …

  9. What is Genetics? | AMNH

    Genetics is the science of genes and how traits are passed on from one generation to the next. People who study genes are geneticists (juh-net-i-sists).