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GENETIC HANDEDNESS

GENETIC HANDEDNESS. Do parent’s dominate hand determine their child’s dominate hand?. QUESTION.

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GENETIC HANDEDNESS

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  1. GENETIC HANDEDNESS

  2. Do parent’s dominate hand determine their child’s dominate hand? QUESTION

  3. The purpose of my investigation is to determine if a parent’s dominate hand will determine their child’s dominate hand. This is important to know because most companies make items for a righty. Should companies make items for a lefty? Or are there not enough left handed people to be worth it? My investigation will determine this. PURPOSE

  4. I hypothesize that a child will become left handed more often if one or more of their parents are left handed and vice versa. I believe this because if you are to become a lefty, your parents must have some recessive genes to give you. If a parent is left handed, they have to give you a recessive gene. Then you have a better chance of becoming a lefty. HYPOTHESIS

  5. I think the best way to test this is to interview lots of students and ask them the dominate hand of both of their parents and themselves. Then I can make an average of how many children become a lefty depending on their parents. Or if a parent is a lefty , what percentage of kids become left handed. I will count a boy to be more like his father and a girl to be more like her mother. PROCEDURE

  6. No materials needed. MATERIALS

  7. MANIPULATED VARIABLE: The person being asked. • RESPONDING VARIABLE: Whether subjects handedness is the same as their parents. • CONSTANT VARIABLE: Subjects must have both a mother and a father. They also have to know whether their parents are left or right handed. VARIABLES

  8. 1.Ask a female test subjects if they are right or left handed. 2.Record response. 3.Repeat, but ask about mother. 4.Repeat, but ask about father. 5.Repeat steps 1-3 with 1 more female. 6.Repeat steps 1-3 with 2 males. 7.Repeat steps 1-5 for 4 more trials. 8.Calculate percentage of test subjects who match their mother, father, both, or neither. DIRECTIONS

  9. PHOTOGRAPH

  10. DATA CHART

  11. GRAPH

  12. My hypothesis was incorrect. A parents dominate hand does not determine their child’s dominate hand. The average amount of female test subjects that have the same handedness as their father is 80%. The average amount of female test subjects that have the same handedness as their mother is 80%. The average amount of male test subjects that have the same handedness as their father is 80%. The average amount of male test subjects that have the same handedness as their mother is 70%. If I was going to do this experiment again, I would test the connection between children’s dominate hands and their grandparent’s dominate hands. CONCLUSION

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