define mutation for chemistry
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mutation (my-tā'shən) A change in the structure of the genes or chromosomes of an organism. Mutations occurring in the reproductive cells, such as an egg or sperm, can be passed from one generation to the next. Most mutations occur in junk DNA and have no discernible effects on the survivability of an organism.
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Mutation A point mutation that changes a codon with the result that it codes for a different amino acid is called a missense mutation. Such a mutation can change the nature of the protein being formed. It can change the amino acid composition and the protein sequence and, therefore, the structure of that protein.
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What is a mutation? What is a mutation? A mutation is a change that occurs in our DNA sequence, either due to mistakes when the DNA is copied or as the result of environmental factors such as UV light and cigarette smoke. Mutations can occur during DNA replication if errors are made and not corrected in time. 2  Mutations can also occur as the result of exposure to environmental factors such as smoking, sunlight and radiation. 3  Often cells can recognise any potentially mutation-causing damage and repair it before it becomes a fixed mutation.
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- Types of Mutations. Knowing a few basic types of mutations can help you understand why some mutations have major effects and some may have no effect at all. Substitution. A substitution is a mutation that exchanges one base for another (i.e., a change in a single chemical letter such as switching an A to a G).Such a substitution could: 1  change a codon to one that encodes a different amino acid and cause a small change in the protein produced.nowing a few basic types of mutations can help you understand why some mutations have major effects and some may have no effect at all. Substitution. A substitution is a mutation that exchanges one base for another (i.e., a change in a single chemical letter such as switching an A to a G).
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- A mutagen is defined as any chemical that can cause changes in the DNA sequence of an organism. These changes are called mutations ( hence mutation + genos (creator) = mutagen ). Some mutagens are well-known: For example UV radiation. UV has enoug...
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- Definition. A Mutation occurs when a DNA gene is damaged or changed in such a way as to alter the genetic message carried by that gene. A Mutagen is an agent of substance that can bring about a permanent alteration to the physical composition of a DNA gene such that the genetic message is changed. Mutation occurs when a DNA gene is damaged or changed in such a way as to alter the genetic message carried by that gene. A Mutagen is an agent of substance that can bring about a permanent alteration to the physical composition of a DNA gene such that the genetic message is changed.
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- noun, plural: point mutations. A mutation in DNA or RNA molecule involving a change of only one nucleotide base. Supplement. This type of mutation occurring in noncoding sequences often does not result in an altered amino acid sequence during translation.
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Mutation A missense mutation is also potentially serious, since this changes one amino acid to another. When the new amino acid is chemically similar to the old one, there may be little effect on the protein structure and function. When they differ in size, polarity, or charge the effect may be profound.
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What is mutation? A mutation is a permanent change in the DNA sequence of a gene. Mutations in a gene's DNA sequence can alter the amino acid sequence of the protein encoded by the gene.
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What is point mutation? Making the world better, one answer at a time. A point mutation, or single base substitution, is a type of mutation that causes the replacement of a single base nucleotide with another nucleotide of the genetic material, DNA or RNA. One can categorize point mutations as follows: Transition mutations are about an order of magnitude more common than transversions.
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mutagen Any agent that promotes a mutation or causes an increase in the rate of mutational events, e.g., radioactive substances, x-rays, or certain chemicals. mutagen. Any agent capable of changing the structure of DNA without immediately killing the cell concerned.
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- A type of mutation involving replacement or substitution of a single nucleotide base with another in DNA or RNA molecule. Supplement. This type of mutation occurring in noncoding sequences often does not result in an altered amino acid sequence during translation.
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Mutation In biology, a mutation is a permanent change of the nucleotide sequence of the genome of an organism, virus, or extrachromosomal DNA or other genetic elements.utation can result in several different types of change in sequences. Mutations in genes can either have no effect, alter the product of a gene, or prevent the gene from functioning properly or completely.
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-   Answer   A mutation is any change to a strand of DNA which is passed on to an organism's offspring.      DNA mutations are caused usually by chemical in … teractions or radiation (natural and manmade), and most are harmless.onfidence votes 263K. DNA mutation affects the mRna as it is the genetic profile for the being. In replication, the mutation is also replicated propagating the change in all newly developed cells.
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genetic mutation 2. mutation - (genetics) any event that changes genetic structure; any alteration in the inherited nucleic acid sequence of the genotype of an organism. chromosomal mutation, genetic mutation. genetic science, genetics-the branch of biology that studies heredity and variation in organisms.
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- Substitution mutation. Definition. A type of point mutation in which a single nucleotide is substituted with (or exchanged for) a different nucleotide that may result in an altered sequence of amino acid during translation, which may render the newly synthesized protein ineffective.Supplement.xamples of base-pair substitutions: purine substituted with a different purine (A → G) or a pyrimidine for a different pyrimidine (C → T). This type of substitution mutation is transition.
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Genetic Mutation Although various types of molecular changes exist, the word mutation typically refers to a change that affects the nucleic acids. In cellular organisms, these nucleic acids are the building blocks of DNA, and in viruses they are the building blocks of either DNA or RNA.
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Are cell mutations always bad? Are cell mutations always bad? A mutation is a change in the genetic material of an organism. We are made from trillions of cells, each with a nucleus composed of DNA – a set of instructions that tells the cell what to do. Cells copy themselves with astonishing accuracy, but every now and then a piece of code is copied incorrectly.
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Genotype and variation [ â edit | edit source] In biology, a mutation is the permanent alteration of the nucleotide sequence of the genome of an organism, virus, or extrachromosomal DNA or other genetic elements.
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What is deletion mutation? Deletion mutation. Definition. noun. A type of gene mutation wherein the deletion (as well as addition) of (a number of) nucleotide (s) causes a shift in the reading frame of the codons in the mRNA, thus, may eventually lead to the alteration in the amino acid sequence at protein translation.Supplement. type of gene mutation wherein the deletion (as well as addition) of (a number of) nucleotide (s) causes a shift in the reading frame of the codons in the mRNA, thus, may eventually lead to the alteration in the amino acid sequence at protein translation. Supplement.
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ENCODE: The human encyclopaedia Mutation is a change in DNA, the hereditary material of life. An organism's DNA affects how it looks, how it behaves, and its physiology  all aspects of its life.
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- In biology, a mutation is a permanent change of the nucleotide sequence of the genome of an organism, virus, or extrachromosomal DNA or other genetic elements.utations may or may not produce discernible changes in the observable characteristics (phenotype) of an organism. Mutations play a part in both normal and abnormal biological processes including: evolution, cancer, and the development of the immune system, including junctional diversity.
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Biology, Eighth Edition (Raven) A chromosomal mutation is a substantial change in the structure of a chromosome or chromosomes.
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mutation mutation. n. 1. (Genetics) the act or process of mutating; change; alteration. 2. a change or alteration. 3. (Genetics) a change in the chromosomes or genes of a cell. When this change occurs in the gametes the structure and development of the resultant offspring may be affected. See also inversion 11. 4. (Genetics) another word for mutant 1.
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Define a mutation. How, where, and when do they occur? Best Answer: mutation is basically a change of a gene sequence when it's not suppose to. how? the DNA replicates itself billions and millions of time each SECOND (okay, maybe a little exaggerated, but I can't be far off) and they're bound to make some mistakes. these mistakes are MUTATIONS.
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mutation A change in the genes or chromosomes of an organism. Mutations occurring in the reproductive cells, such as an egg or sperm, can be passed from one generation to the next. Most mutations have harmful effects, but some can increase an organism's ability to survive.. Change in a gene or genes of a living cell. A mutation in some way changes the cell’s characteristics and will be inherited. See chromosome, genes.
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Mutation Mutation can result in several different types of change in sequences. Mutations in genes can either have no effect, alter the product of a gene, or prevent the gene from functioning properly or completely.Mutations can also occur in nongenic regions. A nonsense mutation is a point mutation in a sequence of DNA that results in a premature stop codon, or a nonsense codon in the transcribed mRNA, and possibly a truncated, and often nonfunctional protein product.