Homework Answers
total number of offsprings = 1221 + 405 + 412 + 138 = 2176
H0 = There is no significant difference between observed and expected value ( Follow mandalian rule 9 : 3 : 3 : 1 )
HA = There is a significant difference between observed and expected value ( Do not follow mandalian rule 9 : 3 : 3 : 1 )
|
phenotype |
observed |
expected |
O - E |
(O - E)2 |
(O - E)2 / E |
|
+ |
1221 |
2176 *9/16 = 1224 |
3 |
9 |
9/1224 = 0.007 |
|
fb |
405 |
2176 * 3/16 = 408 |
3 |
9 |
9/40 8= 0.022 |
| ns | 412 | 2176 * 3/16 = 408 | 4 |
16 |
16/408 = 0.039 |
| fb,ns | 138 | 2176 * 1/16 = 136 | 2 |
4 |
4/136 = 0.029 |
χ² value is 0.007 + 0.022 + 0.039 + 0.029 = 0.097
degree of freedom = 4-1 = 3
p value from the above data at degree of freedom 1 is greater than 0.05.
So Ho accepted, There is no significant difference between observed and expected value ( Follow mandalian rule 9 : 3 : 3 : 1 ).
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