Your Name:
Per:
Your Animal’s Name:
Paper Bag Pet Project
TABLE OF ALLELES
TRAIT
Sex
Tail
Eye Shape
Eye Color
Eyelashes
Nose Shape
Hair Color
Ear Shape
SYMBOLS FOR EACH ALLELE
XX or XY
Tail (T), No Tail (t)
Slit (E), Oval (e)
Brown (B), Blue (b), green (g), yellow (y)
Eyelashes (L), No Eyelashes (l)
Circle (N), Triangle (n)
Black (H), Brown (h), yellow (y)
Round (R), Pointed (r)
PHENOTYPE
GENOTYPE
CHROMOSOMES
Autosomes
Eye Shape
Hair Color
Ear Shape
Nose
Shape
Eye Color
Eye Shape
Hair Color
Ear Shape
Nose
Shape
Eye Color
Eye Shape
Hair Color
Ear Shape
Nose
Shape
Eye Color
Eye Shape
Hair Color
Ear Shape
Nose
Shape
Eye Color
Sex Chromosomes
Use both X chromosomes and cross out the Y chromosome if your pet is female. Use an X and a Y chromosome if your pet is male
and cross out the other X chromosome.
X Chromosomes
Eyelashes
Eyelashes
Eyelashes
Eyelashes
Y Chromosome
Tail
Tail
Instructions
1. Fill in the phenotype for each trait in the Table of Alleles based on the characteristics of your paper bag pet.
2. Fill in a valid genotype for each phenotype in the Table of Alleles. Select the allele for each genotype based
on the method your teacher specifies.
3. Complete the chromosomes for your paper bag pet by filling in the alleles for each trait in the slot for each
gene. (Use the chromosomes drawn with a solid line and ignore the dotted lines for now.)
4. Note that the eyelash trait and the tail trait are both sex-linked. The eyelash gene occurs on the X
chromosome so male paper bag animals only inherit one copy. The tail gene occurs on the Y chromosome
so female paper bag animals can never have tails since they do not have Y chromosomes.
5. Create gametes for your paper bag pet (eggs or oocytes for females and sperm or spermatocytes for males)
by performing the primary steps of meiosis:
1) DNA replication – Fill in the dotted-line copy of each chromosome and then cut out each
chromosome pair being careful to keep them connected at their centromeres.
2) Crossing Over - Line up each homologous chromosome pair with the other (autosome next to
autosome, sex chromosome next to sex chromosome) and randomly exchange segments of the
chromosomes between each pair by making cuts and then taping the pieces to the homologous
chromatid.
3) Random Assortment – divide the homologous chromosomes from one another by randomly
grouping each autosome with one of the sex chromosomes resulting in the formation of two diploid
cells.
4) Second Cell Division - divide the sister chromatids from one another in both cells by carefully
cutting them apart at the centromere and then randomly grouping each autosome with one of the sex
chromosomes resulting in the formation of four genetically unique haploid cells.
Names:
Period:
Date:
Predict the phenotypes of your offspring.
Sex
Tail
Male: _______%
Tail: _______%
Slit: _______%
Female: _______%
No Tail: _______%
Oval: _______%
Nose Shape
Ear Shape
Eye Shape
Eyelashes
Circle: _______%
Round: _______%
Eyelashes: _______%
Triangle: _______%
Pointed: _______%
No Eyelashes: _______%
Eye Color
Hair Color
Names:
Period:
Date:
Predict the phenotypes of your offspring.
Sex
Tail
Male: _______%
Tail: _______%
Slit: _______%
Female: _______%
No Tail: _______%
Oval: _______%
Nose Shape
Ear Shape
Eye Shape
Eyelashes
Circle: _______%
Round: _______%
Eyelashes: _______%
Triangle: _______%
Pointed: _______%
No Eyelashes: _______%
Eye Color
Hair Color
Brown: _______%
Black: _______%
Blue: _______%
Brown: _______%
Green: _______%
Yellow: _______%
Yellow: _______%
Birth Certificate
This document certifies that
was born this
Child’s Name
day of
in the year
Birth Date
in the city of
Birth Month
Birth Year
in the great state of California to
Birth City
born in
Mother’s Birth
City/State
Mother
and to
Signature of Mother
born in
Father
Father’s Birth
City/State
Signature of Father
.