Transcript Paper Pet Families

Paper Pet
Families
Overview
You will use your knowledge of genetics to
create a paper pet, cross it with a
classmate’s pet, and determine the traits of
the offspring.
Traits
On the next slide, you will see the
dominant and recessive traits of paper
pets. You will use this information to
make your own pet.
Trait
Color
Eyes
Nose
Hair
Teeth
Paper Pet Traits
Dominant
green
round
triangular
curly
pointed
Recessive
yellow
square
oval
straight
square
Step 1 - Gender
Since we are going to create paper pet families,
we need to have the same number of male and
female pets in this class. Choose a card from the
“gender bag” to determine if your pet is going to
be a male or a female. The genotype for females is
xx and the genotype for males is xy. We will
discuss the genoptype later.
Write “male” or “female” on your chart for
phenotype.
Step 2 - Traits
To determine the color of your pet, the shape
of the eyes, nose, and teeth, and the type of
hair your pet will have, you will choose cards
from the “traits bags”. Record these
genotypes and phenotypes on your chart.
Step 3–Drawing Your Pet
Draw your pet’s traits according to the
phenotypes you recorded on your chart.
Paper pets are modest, so owners always
put clothes on their pets. You can use the
picture on the next slide to see how the
clothes fit.
Step 4
To find your pet a mate, the owners of the
male pets will put their pet’s name on a
slip of paper and put them in a bag, and
the owners of female pets will draw them
out.
Step 5
Fill in the genotypes and phenotypes
for your pet and your partner’s pet
on the table that was handed out to
you. Give each pet a name.
Step 6
To decide the gender of each of the
babies, you must know how gender
is determined by the alleles an
offspring receives.
Eggs produced by females always carry an x
allele because a female’s genotype is xx.
Sperm produced by the male can carry an x
or a y allele because a male has a genotype
of xy.
If the sperm carrying an x allele fertilizes
the egg, what will be the gender of the
baby? What if the sperm has the y allele?
To decide which sperm fertilizes the egg, the
owner of the male pet will flip a coin.
Heads = the baby receives the x allele
Tails = the baby receives the y allele
You will need to do this for each baby.
Record the genotypes and phenotypes
for the gender of all six babies and give
each baby a name.
Step 7
Decide the genotypes and phenotypes for all
of the other traits of baby 1 by flipping a coin
to see which of the parent’s alleles the baby
will receive.
Heads = that baby receives the first allele
from that parent
Tails = the second allele
Record these on the table. Repeat this for
all of the traits for all 6 baby pets.
Step 8
Create the six baby pets by cutting out
the baby pet outline on the correct color
of paper and by drawing the appropriate
traits on each baby.
Step 9
Create a family portrait of the paper pet
family by gluing the parent pets and their
offspring to construction paper. Refer to the
example on the board.
Step 10
Complete the “Paper Pet Punnett Square”
page. You should complete 3 of the
Punnett Squares and your partner should
complete the other 3.
These Punnett squares show the possible
genotypes of any offspring produced by
your two pets.
Step 11
Glue the family portraits, the Punnett
Squares, and the data table to a poster board.
Refer to the example on the board.
Step 12
Answer the follow-up questions and
complete the writing assignment.
Step 13
Be prepared to tell the class about your
paper pet family and to explain why
they look like they do.