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Whippo - cloudfront.net
Whippo - cloudfront.net

Whippo
Whippo

... All vertebrates have genes that make hemoglobin Like many other genes, hemoglobin genes mutates at a fairly constant rate, even if they are in different animal groups Rate of change can be used to estimate how long ago groups or organisms diverged from one another! ...
Lecture8-Chap5 Sept26
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... whose sequences are present in multiple organisms. • zoo blot – The use of Southern blotting to test the ability of a DNA probe from one species to hybridize with the DNA from the genomes of a variety of other species. • Human disease genes are identified by mapping and sequencing DNA of patients to ...
problem set
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... mostly by salt-bridge interactions to phosphates in the DNA backbone. Another histone, H1, binds to the linker DNA between nucleosomes. Linker DNA is 15-55 bp in length depending upon the organism. In 30nm fibers, nucleosomes bind to one another in a spiral arrangement wherein ~6 nucleosomes occur p ...
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Chapter 12 - Biotechnology
Chapter 12 - Biotechnology

... Recombinant DNA Technology Restriction enzymes • Restriction enzymes were discovered in bacteria. Bacteria use them as a defense mechanism to cut up the DNA of viruses or other bacteria. • Hundreds of different restriction enzymes have been isolated. Each one cuts DNA at a specific base sequence. F ...
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Bio 93 Quiz 4: Master Copy

... 8) A new DNA strand elongates only in the 5' to 3' direction because A) DNA polymerase begins adding nucleotides at the 5' end of the template. B) Okazaki fragments prevent elongation in the 3' to 5' direction. C) the polarity of the DNA molecule prevents addition of nucleotides at the 3' end. D) re ...
ppt
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B4 Revision

... A knowledge of genes allows us to do selective breeding. This is where we decide what characteristics we want in the next ...
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Extrachromosomal DNA



Extrachromosomal DNA is any DNA that is found outside of the nucleus of a cell. It is also referred to as extranuclear DNA or cytoplasmic DNA. Most DNA in an individual genome is found in chromosomes but DNA found outside of the nucleus also serves important biological functions.In prokaryotes, nonviral extrachromosomal DNA is primarily found in plasmids whereas in eukaryotes extrachromosomal DNA is primarily found in organelles. Mitochondrial DNA is a main source of this extrachromosomal DNA in eukaryotes. Extrachromosomal DNA is often used in research of replication because it is easy to identify and isolate.Extrachromosomal DNA was found to be structurally different from nuclear DNA. Cytoplasmic DNA is less methylated than DNA found within the nucleus. It was also confirmed that the sequences of cytoplasmic DNA was different from nuclear DNA in the same organism, showing that cytoplasmic DNAs are not simply fragments of nuclear DNA.In addition to DNA found outside of the nucleus in cells, infection of viral genomes also provides an example of extrachromosomal DNA.
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