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Genetics and Handedness In a study of left-handedness as a
Chapter 11, Problem 20BSC(choose chapter or problem)
Problem 20BSC
Genetics and Handedness In a study of left-handedness as a possible inherited trait, the data in the table below were obtained (based on data from “Why Are Some People Left-Handed? An Evolutionary Perspective,” by Laurens and Faurie, Philosophical Transactions,Vol. 364). Use a 0.01 significance level to test the claim that left-handedness is independent of parental handedness. What do the results suggest about the inheritability of left-handedness?
Parental Handedness |
Offspring Left-Handed? |
|
Father/Mother |
Yes |
No |
Right/Right |
5360 |
50,928 |
Right/Left |
767 |
2736 |
Left/Right |
741 |
3667 |
Left/Left |
94 |
289 |
Questions & Answers
QUESTION:
Problem 20BSC
Genetics and Handedness In a study of left-handedness as a possible inherited trait, the data in the table below were obtained (based on data from “Why Are Some People Left-Handed? An Evolutionary Perspective,” by Laurens and Faurie, Philosophical Transactions,Vol. 364). Use a 0.01 significance level to test the claim that left-handedness is independent of parental handedness. What do the results suggest about the inheritability of left-handedness?
Parental Handedness |
Offspring Left-Handed? |
|
Father/Mother |
Yes |
No |
Right/Right |
5360 |
50,928 |
Right/Left |
767 |
2736 |
Left/Right |
741 |
3667 |
Left/Left |
94 |
289 |
ANSWER:
Solution 20BSC
We are given a data set of genetics and handedness. We have to test the claim that left handedness is independent of parental handedness.
Step 1: To test the claim we need to fulfil certain assumptions.
1. We assume that the sample has been randomly selected because of the structure of the study.
2. The results are tabulated as frequencies.
3. The expected frequencies are more than five in every column.