Whorl, Arch or Loop

Table: 417
Experimentation location: School, Home
Regulated Research (Form 1c):
Project continuation (Form 7):

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After I conducted this experiment on my sister and I, I observed that our fingerprints are different-- which means HER prints were random. I am loop and she is arch. My results on the the unrelated people in my experiment were really surprising. Unrelated people mostly having the same prints, that is so cool! The most popular similarity was loop. I could also ell if my subject was a child or adult fingerprint by the size and the appearance of wrinkles present.

Hypothesis was correct! Fingerprints are not ALWAYS genetic, they are random! For example, my subject Johnny is Whorl and his sister is Arch. I was surprised! The most popular fingerprint in my experiment was loop.


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Research Plan:

I am going to study if fingerprints are random or genetic.

I will need: 

Paper Towels Moist Towelette for cleaning hands White print paper, tracing paper,or parchment paper Pencil Clear tape Scissors White Paper Sibling pairs (At Least 15) Unrelated pairs of people(At Least 15) Optional:Magnifying glass Lab Notebook   My Procedure:  1.Press and slide each side of the the right index fingertip one time over the pad 2.Then roll the grey fingertip onto the sticky side of a piece of clear tape. 3.Use another towelette to clean the person's grey finger.

Cut off the piece of tape containing the fingerprint and stick it onto a piece of white paper.



16.Label each fingerprint with a unique code, which will tell you which pair the fingerprint belongs to and whether that is a sibling pair or an unrelated pair.

17.Collect fingerprints from at least 15 sibling pairs and 15 unrelated pairs.

18.Examine each fingerprint and characterize it as a whorl, arch, or loop pattern. You can use a magnifying glass if you have one. In your lab notebook, make a data table creating a separate row for each person, and fill it out.




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