molecular basis of mutations in relation to uv light and chemical mutagens
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Effect of UV radiation • UV radiation promotes the formation of covalent bonds between adjacent thymine residue in a DNA strand ,creating a cyclobutyl ring. They form abnormal chemical bond between adjacent pyrimidine molecule (mainly thymine) in the same strand of the double helix.
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New mutations are categorized as induced or spontaneous. Induced mutations are defined as those that arise after purposeful treatment with mutagens
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