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Genetic Heterogeneity in Human Disease. McCellan and King. 2010
Genetic Heterogeneity in Human Disease. McCellan and King. 2010

... schizophrenia. We found that compared to healthy controls, individuals with schizophrenia were 3-fold more likely to harbor rare structural genomic mutations that impacted genes (Walsh et al., 2008). The risk was even higher in subjects with early onset of schizophrenia. Each rare mutation disrupted ...
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... – Metaphase I – homologous chromosomes line up in middle of cell and spindle fibers attach to them – Anaphase I – homologous chromosomes are pulled to opposite sides of cell by spindle fibers – Telophase I – nuclear membrane reforms around the separated homologous chromosomes, spindle breaks down, c ...
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Managing Genetic Conditions
Managing Genetic Conditions

... Cattle are diploid organisms, material (or the process by meaning they have a pair of with any historic which the change occurs). each type of chromosome, mutations they This change can be as with one inherited from the simple as a swapping of one sire and one inherited from inherited from nucleotid ...
Guided Exploration- (RI3) Learning Goal Three: Explain how DNA is
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... DNA is the directions to build our bodies. The only problem is, DNA is locked inside the nucleus of a cell and can’t get out. To solve this problem, copies of the DNA are made in a form called mRNA. The process of making mRNA from DNA is called transcription. After transcription, the mRNA copies lea ...
Deviations from Hardy-Weinberg Equilibrium
Deviations from Hardy-Weinberg Equilibrium

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Appendix 1

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... Name _______________________________ ...
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... b. Seven bases in 7 positions are different. There are no amino acid differences. This is an example of “degeneracy”, which means that two or more codons can code for the same amino acid. c. Three bases in two codons are different. Two amino acids are different. This is an example of two “mis-sense” ...
DNA WebQuest NAME___________________________
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DNA and the Genetic Code

... Transcription is the synthesis of messenger RNA (mRNA) from DNA. The two DNA strands separate from one another. One strand is used for replication, the other for transcription. mRNA is the complement strand of the original DNA except with T replaced by U (uracil). mRNA carries the genetic informatio ...
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CA DNA Test Development - Arabian Horse Association

... Due to the wide range of expression that has been reported by owners among horses tested as CA/CA (affected), it is possible that, in some cases, horses could have the affected genotype and show no clinical signs. If the MUTYH gene is not fully functioning, this could explain the variable expressio ...
Slide 1
Slide 1

... GJB2, MYO7A, CDH23, OTOF, SLC26A4, TMC1, are quite common and can be tested in individuals with hearing loss. Mutations in many other genes are extraordinarily rare, some of which have been reported in only one or two consanguineous families. ...
BIS2A TM Murphy Page 1 PROBLEMS ON MOLECULAR BIOLOGY
BIS2A TM Murphy Page 1 PROBLEMS ON MOLECULAR BIOLOGY

... b. Seven bases in 7 positions are different. There are no amino acid differences. This is an example of “degeneracy”, which means that two or more codons can code for the same amino acid. c. Three bases in two codons are different. Two amino acids are different. This is an example of two “mis-sense” ...
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Frameshift mutation



A frameshift mutation (also called a framing error or a reading frame shift) is a genetic mutation caused by indels (insertions or deletions) of a number of nucleotides in a DNA sequence that is not divisible by three. Due to the triplet nature of gene expression by codons, the insertion or deletion can change the reading frame (the grouping of the codons), resulting in a completely different translation from the original. The earlier in the sequence the deletion or insertion occurs, the more altered the protein. A frameshift mutation is not the same as a single-nucleotide polymorphism in which a nucleotide is replaced, rather than inserted or deleted. A frameshift mutation will in general cause the reading of the codons after the mutation to code for different amino acids. The frameshift mutation will also alter the first stop codon (""UAA"", ""UGA"" or ""UAG"") encountered in the sequence. The polypeptide being created could be abnormally short or abnormally long, and will most likely not be functional.Frameshift mutations are apparent in severe genetic diseases such as Tay-Sachs disease and Cystic Fibrosis; they increase susceptibility to certain cancers and classes of familial hypercholesterolaemia; in 1997, a frameshift mutation was linked to resistance to infection by the HIV retrovirus. Frameshift mutations have been proposed as a source of biological novelty, as with the alleged creation of nylonase, however, this interpretation is controversial. A study by Negoro et al (2006) found that a frameshift mutation was unlikely to have been the cause and that rather a two amino acid substitution in the catalytic cleft of an ancestral esterase amplified Ald-hydrolytic activity.
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