This is a biology chi-Square question.
This is a biology chi-Square question.
On a capsicum farm, red-fruited capsicums were crossed with cream fruited ones, and the F1 produced were all red. However, crossing two of these resulted in fruits of four phenotypes: red, 180; peach, 59; yellow, 62; and cream 27.
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a) What genetic hypothesis would you propose to explain this result? Your hypothesis should propose genetic notation and refer to the number of genes and alleles, dominance and anything else you consider relevant. [5 marks]
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b) Is the observed phenotypic ratio within the expected range for your hypothesis? Use a chi-square test to decide. Show the calculations you use to obtain your χ2 value, and indicate the value df that applies.    [10 marks]
The formula for calculating chi-square is:
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χ 2 =∑ (O−E)2 E
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The critical values of X2 for p = 0.05 are  1 degree of freedom = 3.841 2 degrees of freedom = 5.991  3 degrees of freedom = 7.815.
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c) Given your hypothesis in (a), what phenotypic ratios would you expect to observe if two peach fruited plants are crossed? Show all workings to explain your answer.        [5 marks]
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I have attached a pdf document of the question incase the formula doesn't make sense when typed here
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Posted 03 Jul 2017 03:07 AM
My Price 7.00
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file 1499053962-Solutions file.docx preview (51 words )
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