You start a cross with a true-breeding red-eyed troll and a true-breeding white-eyed troll, and then cross the F1 offspring to make the F2 generation.  In the F2 generation, you collect 3 red-eyed trolls, 8 white-eyed trolls, and 5 pink-eyed trolls.  Use a chi-square test to evaluate whether the data matches your expectation if the trait is controlled by a single gene with incomplete dominance.     In the spaces below, enter the expected number of offspring in each phenotypic group that you would use to calculate your chi square.  Report your expected values to the nearest 0.01. Expected Number of Pink-eyed trolls  Expected Number of Red-eyed trolls  Expected Number of White-eyed trolls    Calculate your chi-square test and answer the following questions: How many degrees of freedom do you have in this test  Do you reject the null hypothesis?  Yes or no?

Human Anatomy & Physiology (11th Edition)
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ISBN:9780134580999
Author:Elaine N. Marieb, Katja N. Hoehn
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You start a cross with a true-breeding red-eyed troll and a true-breeding white-eyed troll, and then cross the F1 offspring to make the F2 generation.  In the F2 generation, you collect 3 red-eyed trolls, 8 white-eyed trolls, and 5 pink-eyed trolls.  Use a chi-square test to evaluate whether the data matches your expectation if the trait is controlled by a single gene with incomplete dominance.  

 

In the spaces below, enter the expected number of offspring in each phenotypic group that you would use to calculate your chi square.  Report your expected values to the nearest 0.01.

  • Expected Number of Pink-eyed trolls 
  • Expected Number of Red-eyed trolls 
  • Expected Number of White-eyed trolls 

 

Calculate your chi-square test and answer the following questions:

  • How many degrees of freedom do you have in this test 
  • Do you reject the null hypothesis?  Yes or no?
df
1
2
3
4
Probability of exceeding the critical value p
0.10
0.05
0.025
0.01
0.001
2.706
4.605
6.251
7.779
3.841
5.991
7.815
9.488
5.024
7.378
9.348
11.143
6.635
9.210
11.345
13.277
10.828
13.816
16.266
18.467
Transcribed Image Text:df 1 2 3 4 Probability of exceeding the critical value p 0.10 0.05 0.025 0.01 0.001 2.706 4.605 6.251 7.779 3.841 5.991 7.815 9.488 5.024 7.378 9.348 11.143 6.635 9.210 11.345 13.277 10.828 13.816 16.266 18.467
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