Get the Gizmo ready:
Escape Door
Activity C:
Click Clear.
the
Modeling
Drag a black mouse and a white mouse into the
inheritance
parent boxes.
Question: How do scientists predict the genotypes of offspring?
F
F
1. Model: Scientists use a Punnett square to model the different
f
Ff
Ff
genotypes are written across the top and side of the square, filled in. as
possible offspring genotypes from a parent pair. The parent
shown. The four possible offspring genotypes are then
f
Ff
Ff
The first square is filled in for you. Fill in the remaining squares.
A. What are the genotypes of the offspring?
Ff
B. What percentage of the offspring will have black fur? 100%
C. What percentage of the offspring will have white fur? 0%
2. Experiment: Click Breed several times. Were your predictions correct?
Yes
3. Use the Punnett squares below to model each parent combination. offspring. After filling in
each Model: Punnett square, predict the percentages of black and white
Parent 1: Heterozygous black (Ff)
Parent 1: Heterozygous black (Ff)
Parent 2: Homozygous white (ff)
Parent 2: Heterozygous black (Ff)
F
F
f
f
Ff
F
FF
Ff
ff
f
Ff
ff
f
Ff
ff
Predicted % black offspring:
Predicted % black offspring:
Predicted % white offspring:
Predicted % white offspring:
(Activity C continued on next page)
