Evolution Exam 2 ( Take Home ) Name - 1371 Words

Evolution Exam 2 (Take Home) Name: 1. Mutation is a driving force for the evolution of a species. Describe the 3 main mutations that can occur in a gene, and the impact those mutations will have on protein structure/function. (5 pts) Gene mutations are also known as point mutations and they involve changes in the structure of a gene due to the change in their chemical nature. Examples of three main mutations that occur in a gene are: Insertion- this is the addition of an extra base onto an existing DNA strand. The resulting m-RNA base and the subsequent amino acid alignment are altered and no polypeptide chain is formed since none of the intended amino acid have been linked, the impact will have on protein called Frameshift. Deletion – this is the removal of a gene portion on a DNA strand. Consequently the sequencing of the amino acid on the polypeptide chain is altered, resulting to production of a wrong protein, also have Frameshift impact on the protein. Inversion – if a portion of the DNA strand rotates through 1800 that portion is said to have inverted and hence altering the protein’s base sequence at this point. 2. You have identified a novel mutant allele for the HiBrn8 gene leading to decreased response to stimuli by the brown bear during hibernation. You have obtained the sequence for wild type and mutant alleles for ABCR. The underlined portion is an intron.Show MoreRelatedPeer Pressuring Parents : High School Being On The Honor Roll896 Words   |  4 Pagesthe honor roll was a huge deal to me. I loved the feeling of making my parents proud. During my junior year at Saint Clair High School I took AP biology for a semester. Even though I didn t want to take it, my parents pushed it on me. Even the counselor forced it on me. I felt like if I didn’t take it, my parents would be disappointed in me. That was something I would not let happen. With all the pressure I finally gave in. It was a hot day in the beginning of September. 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