In fruit flies normals wings are dominate to long wings In a

In fruit flies, normals wings are dominate to long wings. In a cross Nn Nn, the results were 274 normal winged, 58 long winged. Perform an x^2 analysis to determine if the results fit your hypothesis (show hypothesis)

Solution

Answer:

Normal wings dominant genotype = NN and Nn

Long wings are recessive, genotype= nn

        Cross between genotypes= Nn x Nn

                                             =   NN, Nn,nN, nn

                                        Three wings normal and one long wing.

                                         The ratio is 3:1,

                     If the number of individuals are 332,      for 3:1 ratio, the expected values should be 249 : 83

To perform chisquare analysis,

                         

Chi-square value (d2/e) = 10

The deviation is high, so it doesnt fit.

Normal wings Long wings
Observed (o) 274 58
Expected (e) 249 83
Deviation (o-e) 25 -25
Deviation(d2) 625 625
d2/e 625/ 249 = 2.51 625/83= 7.5
In fruit flies, normals wings are dominate to long wings. In a cross Nn Nn, the results were 274 normal winged, 58 long winged. Perform an x^2 analysis to deter

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