Essay on Student Exploration Dna Fingerprint Analysis

Name: Date: Student Exploration: DNA Fingerprint Analysis Vocabulary: codon, DNA, DNA fingerprint, genotype, identical twins, nitrogenous base, phenotype, trait Prior Knowledge Questions (Do these BEFORE using the Gizmo.) 1. The two navy officers shown at left are identical twins. Why do you think identical twins look so similar? Identical twins look so similar because identical twins have the same genetic makeup, meaning, the same DNA (same nitrogenous bases). This is because by they are fertilized by the same egg, making them identical. 2. Most brothers and sisters don’t look exactly the same. What causes most siblings to have different†¦show more content†¦It can be used in the real world to identify relationships between individuals by determining if two people are related. It could also be used to touch upon heritage from looking at back in generations. DNA fingerprints can also be used to identify a victim and help identify suspects in a crime scene. Lastly it can be used for personal identification. In some places, it requires you to give DNA fingerprints in order to identify a person. Activity B: Comparing bands | Get the Gizmo ready: * Select the POPULATION tab. | | Introduction: In this frog population, traits such as eye color, skin color, and the presence or absence of spots are coded for by DNA. The nitrogenous bases in a strand of DNA make up an organisms genotype. The physical expression of the genotype is the phenotype. Question: How are DNA fingerprints used to analyze traits? 1. Observe: Describe frog A’s phenotype. Frog’s A has a presence of spots located on the body, and the eye color is pink. Also, the skin color is orange. 2. Compare: Which frogs share frog A’s skin color, but not its eye color or spots? Frogs H and P. 3. Analyze: A group of three consecutive nitrogenous bases in a strand of DNA is a codon. In a real organism, hundreds of codons code for a trait. In the Gizmo, a single codon codes for a trait. 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