Assignment 1 - David Brewer Assignment 1, General Genetics,...

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David Brewer Assignment 1, General Genetics, Spring, 2008 1. a) Phenylalinine to Tyrosine b) Breast milk, meat , chicken , fish , nuts , cheese and other dairy products. Starchy foods such as potatoes , bread , pasta , and corn . Many diet foods and diet soft drinks that contain the sweetener aspartame . c) About 300 alleles are present at the locus. The different alleles code for enzymes of varying effectiveness. d) A loss of function allele is a gene mutation that eliminates the function of a gene With two loss of function alleles they would be unable to breakdown phenylanine to tyrosine and it would accumulate and be converted to phenylpyruvic acid which could lead to mental retardation. e) The presence of two different mutant alleles at a particular gene locus , one on each chromosome of a pair. Because of the probability of having the same mutant allele would be very small with 300 alleles. f) If the person receives a diet low in phenylanine them the symptoms associated with
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Assignment 1 - David Brewer Assignment 1, General Genetics,...

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