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PPT: Genetics: From Mendel to Genome and Epigenome
PPT: Genetics: From Mendel to Genome and Epigenome

... The Greek prefix “epi” means “on top of” or “over”, so the term “Epigenetics” literally describes regulation at a level above, or in addition to, those of genetic mechanisms. Robin Holliday and John Pugh proposed that changes in gene expression during development depends on the methylation of specif ...
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... • Found in the nuclei of cells – there is 46 chromosomes in each human cell nuclei • If the DNA in all 46 human chromosomes in 1 cell were uncoiled it would stretch out to be more than 6 feet in length • Crick and Watson worked out the structure of DNA = double helix • Contains all your traits (gene ...
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... The 16S rRNA gene rRNA genes are the essential genes for the survival of all organisms due to their role in protein synthesis.1 The 16S rRNA gene is about 1500 bp long and it is a composed of well conserved 10 regions and 10 divergent regions.4 There is a constant mutation rate of about 1% per 50 ye ...
1BIOLOGY 220W - Lecture Notes Packet
1BIOLOGY 220W - Lecture Notes Packet

... alleles that the heterozygotes have, we get (16 x 2) + 48 = 80 copies of the S allele. Similarly, for the count of the L alleles we get 48 + (36 x 2) = 120. In our sample of 100 people there are 200 gene copies, because everybody gets an allele from their mother and one from their father (except fo ...
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... In biology class, these floaters are called “free nucleotides.” They’re “free” because they’re not attached to anything, but they also cost zero dollars, so they are in many ways free nucleotides. I bet they don’t wear underwear or bras either. Now that all the new nucleotides have been matched up, ...
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... things can happen and odd strings of sequence can start to grow in length. Sometimes, the DNA copying machinery stutters and duplicates a particular sequence of nucleotides. Once this has happened it is more likely to happen again in the same place, so patches of repeating sequence can expand over m ...
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... cell, RNA is usually single-stranded, while DNA is usually doublestranded; RNA nucleotides contain ribose while DNA contains deoxyribose (a type of ribose that lacks one oxygen atom); and RNA has the base uracil (U) rather than thymine (T) that is present in DNA. Chromosomes A chromosome is an organ ...
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AP Bio Ch.18 “Genetics of Viruses and Bacteria” The Genetics of Viruses
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... RFLPs, simple sequence DNA, and other polymorphisms (about 200 per chromosome. Based on recombination frequencies. Resulted in map with 5,000 markers. Physical Mapping: Made by cutting the DNA of each chromosome into a number of restriction fragments and then determining the original order of the fr ...
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... nucleic acids, later called RNA and DNA. In 1929, Phoebus Levine at the Rockefeller center identifies the four bases of DNA. ...
Chapter Eleven: Chromosome Structure and Transposable Elements
Chapter Eleven: Chromosome Structure and Transposable Elements

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... bacteria to the R bacteria to cause disease, and that this must be the genetic material—TRANSFORMATION • Transformation – change in the genotype (genetic makeup of an organism) caused when cells take up foreign genetic material • The cause of transformation was not known at the time • Griffith's Exp ...
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Nucleic acid double helix



In molecular biology, the term double helix refers to the structure formed by double-stranded molecules of nucleic acids such as DNA. The double helical structure of a nucleic acid complex arises as a consequence of its secondary structure, and is a fundamental component in determining its tertiary structure. The term entered popular culture with the publication in 1968 of The Double Helix: A Personal Account of the Discovery of the Structure of DNA, by James Watson.The DNA double helix polymer of nucleic acids, held together by nucleotides which base pair together. In B-DNA, the most common double helical structure, the double helix is right-handed with about 10–10.5 base pairs per turn. This translates into about 20-21 nucleotides per turn. The double helix structure of DNA contains a major groove and minor groove. In B-DNA the major groove is wider than the minor groove. Given the difference in widths of the major groove and minor groove, many proteins which bind to B-DNA do so through the wider major groove.
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