Genetics & Fingerprints 1

NAME____________________ GENETICS & FINGERPRINTS BACKGROUND INFORMATION: Fingerprints are genetic. The whorl, or swirl pattern has the genotype LL. The arch pattern has the genotype ll. The loop pattern has the genotype Ll. QUESTION: What are the fingerprint phenotypes and genotypes in your class? MATERIALS: Graphite pencil

Tape

PROCEDURE 1. Using the side of your pencil, cover the square with a heavy coat of pencil “lead.”

2. Roll your right thumb across the box. 3. Put a piece of tape, sticky side down, over your thumb and lift it up gently. You should see your fingerprint on the tape. Put the tape on the thumb of the hand in the observation section. 4. Repeat with all of your fingers on your right hand. OBSERVATIONS:

M. Poarch science-class.net - 1999

Genetics & Fingerprints 2

ANALYSIS & CONCLUSIONS: 1. What is the fingerprint on your ring finger? Draw a Punnett Square to show how you inherited this particular print.

2. Take a survey to see the most common type of fingerprint in the class. Make a table to show your results.

3. List three questions that this activity made you think about. Pick one of them and design an experiment to find out the answer.

M. Poarch science-class.net - 1999

Fingerprints Lab.pdf

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