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Cancer Doesn’t Happen Overnight
Cancer Doesn’t Happen Overnight

... Bold entries indicate new or changed listing in The Report on Carcinogens, Eleventh Edition. Red entries- exposure is common and preventable ...
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... DNA just happen.  Our DNA can change without warning, which changes the genes and how they behave.  Factors that cause changes in our DNA:  Errors when DNA is copied for new cells  Environmental factors change DNA (nicotine, sunlight, x-rays, chemicals  Mutations are inherited from the parents ...
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Mutations are heritable alteration in DNA sequence Most common

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DNA Study Guide 1. The sides of a DNA molecule are made up of

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Cribado genético del cáncer colorrectal mediante el estudio del

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Transposons_&_DNA_Mutations

... Genetic characteristics of a population can change over time – “Evolution” ...
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... A gene mutation is a change in the specific order of the bases that make up a particular gene. For example a base may be: - Added – Deleted - Substituted for another in a gene. Effects of Mutations 1. Positive Mutation - Benefits an individual such as resistance to disease 2. Negative Mutation - Har ...
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... • Most mutations are automatically repaired by the organism’s enzymes and therefore have no effect!!! • If not, the mutation can be passed on . . . . . . ...
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summing-up - Zanichelli online per la scuola

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Grade 9 Science Ch 4 - Answers to Comprehensive Questions

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Chapter 10
Chapter 10

...  Review the history of the discovery of this structure. 2. "One geneone polypeptide"  Discuss how the structure of DNA allows genes to contain instructions for polypeptide synthesis.  List some exceptions to this rule. 3. DNA synthesis is a very precise process by which both strands are reproduc ...
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Genetics

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Evidence that a Safe Dose of Mutagen Does Not Exist
Evidence that a Safe Dose of Mutagen Does Not Exist

... for liver). This further confirms that repair pathways are by no means failsafe. (see point 9 below) 4. Most of the inherited gene defects that predispose an individual to cancer (i.e. the 1-2 % of cancers that are not due to environment-induced somatic mutations) are mutations is genes that encode ...
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Mutagen



In genetics, a mutagen is a physical or chemical agent that changes the genetic material, usually DNA, of an organism and thus increases the frequency of mutations above the natural background level. As many mutations can cause cancer, mutagens are therefore also likely to be carcinogens. Not all mutations are caused by mutagens: so-called ""spontaneous mutations"" occur due to spontaneous hydrolysis, errors in DNA replication, repair and recombination.
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