I chose this question because I thought fingerprints would be an interesting topic to study and it would be simple and easy enough to do. I also thought it would stand out as a unique project and it wouldn't be similar to any other kid's project. I also decided on this question because last year, when I was in fourth grade, a girl in fifth grade did the same project and won first place for her grade, so I 'm hoping to do as well and have as much luck.
The way I'll test this experiment is I'll find four or five families and print their fingerprints on different pieces of paper and search for little similarities and see
if the family's type of fingerprint is the same.
By Mason Wood
Fingerprints on objects are made from natural secretions of sweat on the ridges of your fingers. The special ridges on your fingers that make a fingerprint are used to grip objects and to feel different surfaces. There are different types of fingerprints such as: the plain arch, the tented arch, the lunar loop, the radial loop, the plain whorl, the central pocket loop, the double loop whorl, and accidental whorl. The three most common patterns are loop, whorl, and arch. The loop is the most common for people to have.
People can find fingerprints because of the sweat on fingers. If someone wears latex gloves, people can find the ridge prints because of the steam from sweat and if the finger makes contact with the glove, there is also a print. Prints can also be found with special powders. A simple way to take a fingerprint is with clear tape. With clear tape you just put it on the fingerprint and pull it off and the print comes clear.
The first discovery of fingerprints was made by Henry Faulds, a Scottish scientist in 1880. Fingerprints change size but never shape; even if there is a wound, the epidermis would grow back exactly the same, unless a scar forms. Fingerprint shapes and patterns are determined by a person’s parents and DNA.
Fingerprints can be found almost everywhere and on almost anything. Fingerprints are very important to police for crime scene investigations. They are also used for identification and classification. Fingerprints are unique to each person and are never exactly the same. Even the print on your left hand finger won’t be the same as the print of the same finger on your right hand.
If I take the fingerprint patterns of a family members, my results will be that most fingerprint patterns are inherited by parents and shared between siblings because fingerprint patterns depend on the DNA and genes of their parents.
1. One ink pad (black)
2. Five zip lock snack bags
3. 28 eight by thirteen cm note cards
4. Five families
5. Pictures of the various fingerprint patterns
1. Take the fingerprints from both thumbs of each family member I'm using by having the family members put their thumbs in the ink and then place their thumbs on the note cards.
2. Label the thumb prints on the cards, left or right. Write the participant's name on the note card.
3. Label the snack bags with the last names of the families I'm using.
4. Put the cards of the families' into of the same snack bag they belong to
5. Compare the prints of the families to the pictures of the various fingerprint patterns and record your results and conclusion
My results were that:
· 56% of kids had the same left thumbprint pattern as their father
· 33% of kids had the same right thumbprint pattern as their father
· 27% of kids had both the same print patterns as their father
· 61% of kids had the same right print pattern as their mother
· 56% of kids had both the same print patterns as their mother
o Note: Some mothers and fathers had the same print patterns as each other
-78% of kids had the same left print pattern as one of their parents
-72% of kids had the same right print pattern as one of their parents
The data shows that per left thumb, 14 out of 18 (78%) shared a print pattern with a parent and that 13 out of 18 (72%) right thumb print patterns were shared with a parent. If print patterns are random, only 12.5% or 2 out of 16 print patterns would be the same (see table).
Since the actual percentage matches is so much higher than the random statistical likelihood of occurrence I concluded that the print patterns are likely a trait inherited from parents.
www.sciencebuddies.org /science-fair-projects/project_ideas/ Genom_p009.shtml
ridges: raised line or strip
epidermis: outer layer of skin
genes: complex chemical unit of a chromosome that carries heredity