Look for this picture
in your lab book.
This power point
goes with this
picture.
How do you
do a Punnett
Square?
By Mrs. Rothenberger
How do I cross a woman with a widow’s peak
whose genotype is (Ww) with a man who has
a straight hairline (ww)?
Step 1: Place
the female’s
alleles on the
top of the
Punnett Square.
Step 2: Place the
male’s alleles on the
side of the Punnett
Square.
W
w
W
w
w
w
How do I cross a woman with a widow’s peak
whose genotype is (Ww) with a man who has
a straight hairline (ww)?
W
Step 3: In each
box, write the
letter that is
above it and
the letter that
is next to it.
w
w Ww
w
ww
W
w
w Ww ww
w Ww w w