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Name_______________________ Period

... alleles. You may want to consult Figure 12.2 in your text, and model your sketches on this. ...
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Powerpoint file

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Review Questions yeast lecture 18

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... six million such genes have accumulated over the last 20 years in DNA databanks as scientists with the new decoding machines have deposited gene sequences from thousands of microbes. ...
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Gene Linkage and Crossing Over

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Finding Protein-Coding Genes

... interests lead you in a different direction, you are free to follow that direction as long as it deals with gene annotation. You may do the assignment on genomic regions from ANY organism (including bacteria, plants, and fungi) but you will probably have to do more independent investigation than if ...
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Essential gene



Essential genes are those genes of an organism that are thought to be critical for its survival. However, being essential is highly dependent on the circumstances in which an organism lives. For instance, a gene required to digest starch is only essential if starch is the only source of energy. Recently, systematic attempts have been made to identify those genes that are absolutely required to maintain life, provided that all nutrients are available. Such experiments have led to the conclusion that the absolutely required number of genes for bacteria is on the order of about 250-300. These essential genes encode proteins to maintain a central metabolism, replicate DNA, translate genes into proteins, maintain a basic cellular structure, and mediate transport processes into and out of the cell. Most genes are not essential but convey selective advantages and increased fitness.
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