+ Last experiment:
Phenotype
Number of males Number of
(O-E)^2
females
F1 Gen
Wild-type(+)
506
489
F2 Gen
Wild type both
traits(+)
282
268
Sepia-eyes, wild
98
82
type body(s+)
Wild type eyes,
100
90
black body(+b)
Sepia eyes, black 33
36
body(sb)
X^2=
P-Value=
Fail to reject null hypothesis.
I
Figure 7: Punnett square of genotypes of F2 generation female cross with both sepia eyes and a
black body with a wild-type male
++
S+
+b
sb
+
++++
+s++
S+
+s++
ss++
++b+
s+b+
+s+b
sstb