B BB
Bb
Field Mice
A scientist collected a population of field mice. All of
the mice collected had brown fur, which is an
autosomal dominant trait in this population. In some
of the laboratory-bred mice, a white mouse
occasionally appeared. The Punnet square shows the
cross that would produce a white mouse.
b
Bb
bb
10
9
On the Punnet square, which of
these represents the genotype of
a white mouse?
If two white mice were crossed,
what percent of their offspring
would be expected to have
white fur?
Ab
B BB
C Bb
D bb
A 100%
B 75%
C 25%
D0%