Star Wars Punnett Square Practice
Chewbacca recently met a beautiful Wookie when he visited his home planet of Kashyyyk. Chewbacca is
heterozygous for his brown hair, but she has red hair. Using a Punnett Square, calculate the probability of
their children having brown and red hair.
What are the chances of a child with brown hair?
____ out of _____ or _____%
What are the chances of a child being born with red hair?
____ out of _____ or _____%
Wicket W. Warrick, the general of the Ewoks and his wife recently found out they are expecting a baby
Ewok in June. Many of Wicket’s relatives have striped brown and gray fur, the recessive trait for Ewok fur.
Wicket is heterozygous for solid brown fur and his wife is homozygous for solid brown fur. Using a Punnett
Square, calculate the probability of their baby having solid brown fur and striped brown and gray fur.
What are the chances of a baby with solid brown fur?
____ out of _____ or _____%
What are the chances of a baby with striped brown and gray fur?
____ out of _____ or _____%
Jedi Knights all have “The Force”, a dominant trait caused by the amount of metachlorian in the body.
People with the recessive trait do not have “The Force” and cannot become Jedi Knights. A Jedi Knight is
heterozygous for “The Force”. He falls in love and marries a girl who is also heterozygous for “The Force”.
Using a Punnett Square, predict the number of children that will be born with “The Force” and the number
of children who will be born without “The Force”.
If they have 4 children, how many children will have “The Force”?
If they have 4 children, how many children will not have “The Force”?