1. What is a point mutation? new point mutations. 2. Every human child born has

Question

1. What is a point mutation? new point mutations. 2. Every human child born has approximately 3. How to toad toxins normally work? 4. Describe how certain animals evolved resistance to the toad toxin. S. The point mutations changed the "shape and stickiness of the protein." The mutation changed the sequen of amino acids in the protein, which is defined as the protein's amino acid sequence led to a change in the shape, or from Unit 3) structure. The change in structure of the protein(not in the video; 6. A mutation completely inactivated the gene that encoded the protein pump (the gene was not transcribed or ). Would you expect this mutation to be beneficial (have a fitness advantage)? Why or why not? Gene Duplications 1. What is one of the most common ways that new genes evolve? 2. What is a gene duplication event? 3. Why are subsequent mutations in the duplicated gene important for evolution? 4. What does the new protein encoded by the duplicated gene in the dachshund do during the dog's development? 5. How is the RNase I protein encoded by the duplicated gene different than the RNase I encoded by the original gene? 6. What type of mutation around the Factor X gene could allow the protein to be expressed in new tissues? dint: Think Unit 3

Explanation / Answer

1. A point mutation is a kind of genetic mutation whereby there is a change in one or a few base pairs in the nucleotide of an organism. A point mutation may change the phenotype of the organism if it occurs within the coding regions of the gene or the sequences regulating the gene. Point mutations can be base pair substitutions mutations which includes transition as well as transversion mutations.

2.

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