Student Exploration- DNA Analysis (ANSWER KEY).

Student Exploration: DNA Analysis Vocabulary: allele, codon, DNA, DNA sequence, gene, genotype, identical twins, nitrogenous base, phenotype, trait Prior Knowledge Questions (Do these BEFORE using the Gizmo.) The two navy officers shown at left are identical twins. Why do you think identical twins look so similar? Most brothers and sisters don’t look exactly the same. What causes most siblings to have different appearances? Gizmo Warm-up Most of an organism’s traits, or characteristics, are determined by genes encoded in DNA. Traits are determined by the sequence of the four nitrogenous bases in the DNA molecule: adenine, thymine, cytosine, and guanine. Except for identical twins, the DNA sequence of every individual is unique. In the DNA Analysis Gizmo™, you will analyze partial DNA sequences of frogs. Select the POPULATION tab. What are the three main traits that vary between the frogs? Which frog would you expect to have the most similar DNA