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DIOBPT _ PUB _ BIOLOGY _ SC _ MAP
DIOBPT _ PUB _ BIOLOGY _ SC _ MAP

... in specialized areas of the organism’s cells B1.7 Most macromolecules (polysaccharides, nucleic acids, proteins, lipids) in cells and organisms are synthesized from a small collection of simple precursors. B4.5Proteins can differ from one another in the number and sequence of amino acids. B4.6Protei ...
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mutation as a source of variation

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W09micr430Lec17 - Cal State LA

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Point Mutation

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Mitosis and Meiosis

... • Results in a change of the DNA code (base sequence) or chromosome number • Can cause a change in hair colour, skin colour = harmless • Others can impede or stop cell function, others can affect cell division (cause tumours and cancer) = harmful • If a change during meiosis, can be passed on to o ...
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last of Chapter 11, all of Chapter 12

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10.6AC The Pattern - Texarkana Independent School District
10.6AC The Pattern - Texarkana Independent School District

... 1. On rare occasion, codons are inserted, deleted, or substituted for one another during the process of DNA replication. Biologists identify these changes in DNA molecules as ___ (a) transferences. (b) mutations. (c) replications. (d) natural selection. 2. A biology teacher lists and explains some o ...
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16.7 Screening for clinically important genes

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Until now our analysis of genes has focused on gene function as

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... 60. Triploid watermelons are derived from crosses of tetraploid x diploid parents. a) T b) F 61. The cultivated banana is triploid and sterile. Which of the following is the most likely source of genetic variation in this species? a) Mutation b) Recombination 62. The fact that there can be up to fo ...
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Beginning to crack the code of `junk DNA`

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... DNA is the molecule that codes for heredity. Normally it is in the form of chromatin, but during cell division it forms structures called chromosomes. A gene is a specific part of a chromosome that is responsible for a certain trait. Alleles are the variations or “flavors” of a gene. ...
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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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