Because fingerprints can be used to identify people, you will need their consent to take and use their fingerprints. Make up a consent form for your science project.To create a fingerprint, press and slide each side of the person's fingertip over the pad one time, then roll the fingertip onto the sticky side of the tape and stick the tape to a piece of white paper. When your prints start to fade, rub your pencil a couple of times over your pad and try again.įigure 3.Perfect your technique until the fingerprints come out clear each time.Cut off the piece of tape containing the fingerprint and stick it onto a piece of white paper, as shown in Figure 3.Use another towelette to clean the person's grey finger.The result will look like the tape in Figure 3. Then roll the grey fingertip onto the sticky side of a piece of clear tape.Press and slide each side of the the right index fingertip one time over the pad.Thoroughly dry the finger with a paper towel.Use a moist towelette to clean the person's right index finger.To make an ink pad variation, rub a pencil on a piece of printer paper, parchment paper, or tracing paper several times until an area of about 3 by 3 centimeters (cm) is completely grey, as shown in Figure 3 (the paper on the left).First try the technique on yourself, then ask a friend or family member to let you learn by using his or her fingerprints. To start this science project, practice taking reliable, clear fingerprints.What are the different types or classes of fingerprints?.What procedures do officials, like the police, use to record fingerprints?.What are fingerprints and how are they formed?.What does it mean to be biologically related?.Therefore, if DNA determines fingerprint patterns, then siblings are more likely to share the same fingerprint category than two unrelated individuals are. This results in a greater degree of matching traits between siblings than between unrelated individuals. All biological siblings are the mixture of both parents' DNA. This is because children receive half their DNA from each parent. Have you ever looked at two girls and said, "you must be sisters"? We can often tell that two people are siblings because they appear to have several similar physical traits. In this science project, you will examine fingerprints from siblings versus pairs of unrelated individuals to figure out if general fingerprint patterns are genetic or random. The DNA that a person inherits from their parents determines many personal characteristics and traits, like whether someone is right- or left-handed or the color of their eyes. The three basic fingerprint patterns are illustrated here.
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