Kat Weiss
Chi-Square Example Prediction: Autosomal, White Dominant, Male Is Heterozygous Expected Ratios from Punnett Square ? W+ W+
W- WW+
WW+
W+
W+W+
W+W+
1/2 White-eyed, 1/z Red-eyed
Flies
Observed (O) Expected (E) 90 60 30 60 120
(O-E) 30 -30
(O-E)2 006 900
(O-E)2/E 15 15 x2= 30
White-eyed Red-eyed Total
Sex-Linked Chi-Square Example Prediction: Sex-Linked, White Dominant Expected Ratios from Punnett Square ? xW+ Xw+
Xw-xw+
XW-XW+
1/z are White-eyed females
Xw+Y
Xw.Y
1/z are Red-eyed males
Flies
Observed (O) Expected (E) 44 47
(O-E)
(O-E)2
(O-E)2/E
White-eyed females White-eyed males Red-eyed females Red-eyed males Total
-3
9
0.19
0
0
0
0
0
0
0
0
0
50
3
6
47
0.19
120 94
x2 = 0.