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  1. Mutagen - Wikipedia

    In genetics, a mutagen is a physical or chemical agent that permanently changes genetic material, usually DNA, in an organism and thus increases the frequency of mutations above the natural …

  2. Mutagen - National Human Genome Research Institute

    2 days ago · A mutagen is a chemical or physical phenomenon, such as ionizing radiation, that promotes errors in DNA replication.

  3. Mutagen | DNA damage, genetic mutations, carcinogens | Britannica

    Mutagen, any agent capable of altering the genetic constitution of a cell by changing the structure of the hereditary material, deoxyribonucleic acid (DNA). Many forms of electromagnetic …

  4. What Is a Mutagen? Definition, Types, and Effects

    Aug 16, 2025 · A mutagen is an agent that causes mutations in an organism’s genetic material, typically DNA or RNA. These alterations can affect the sequence or structure of DNA, …

  5. What Is a Mutagen? Examples and Their Effects - ScienceInsights

    Nov 10, 2025 · A mutagen is an agent that causes a permanent change, or mutation, in the genetic material of an organism, typically deoxyribonucleic acid (DNA). These agents elevate …

  6. Definition of mutagen - NCI Dictionary of Cancer Terms

    mutagen (MYOO-tuh-jen) Anything that causes a mutation (a change in the DNA of a cell). DNA changes caused by mutagens may harm cells and cause certain diseases, such as cancer. …

  7. Mutagen - an overview | ScienceDirect Topics

    A mutagen is a physical agent or chemical reagent that causes mutations. For example, nitrous acid reacts with some DNA bases, changing their chemistry and hydrogen bonding properties, …

  8. Mutagenesis - Wikipedia

    A mutagen is a mutation-causing agent, be it chemical or physical, which results in an increased rate of mutations in an organism's genetic code. In nature mutagenesis can lead to cancer and …

  9. MUTAGEN Definition & Meaning - Merriam-Webster

    The meaning of MUTAGEN is an agent (such as a chemical or various radiations) that tends to increase the frequency or extent of mutation.

  10. What Is a Mutagen and What Are Some Examples?

    Aug 19, 2025 · A mutagen is an agent that causes changes in an organism’s genetic material, specifically its DNA or RNA. These changes, known as mutations, alter the genetic code.