Punnett square mastery project
Name ____________________
Our unit on heredity relies heavily on the Punnett square. The Punnett
square is a great tool to predict likely offspring genotypes whenever two
organisms have children. It applies to many traits we observe, but not all of
them.
You will have to demonstrate that you have achieved proficiency or mastery
of Punnett squares. You have several options to do this. Over the coming
days, you will have time to practice your Punnett square skills and gather
evidence that you are proficient or masterful in using a Punnett square. The
evidence can take the form of worksheets, practice problems from notes, or
your own Punnett square problems that you create. You must collect this
evidence and attach a written explanation that explains how you have
achieved your goal and that refers to your evidence.
Punnett square skills involve two parts:
1. Know what makes up a Punnett square (what do all the parts show
you and where do you put information).
2. Use a Punnett square to find the expected genotypic/phenotypic ratios.
On the back of this sheet you will find a rubric that explains in detail how to
demonstrate proficiency and mastery for each skill.
In summary, next week you will turn in a packet that includes:
 Multiple examples (at least 2) of you using Punnett squares
 Multiple examples (at least 2) of your understanding of the parts of a
Punnett square
 A one page explanation for each part of the project showing how well
you understand Punnett squares and where you think your
understanding is at, based on the rubric.
 This sheet, with the back filled out.
This project is due January 25th.
Mastery
Skill 1a: Parts of Can use an
Punnett square
alternative
(5 points)
representation of
inheritence and
relate its parts to
a Punnett square
Skill 1b: Create a Given a two trait
Punnett square
Punnett square,
(5 points)
student can
deduce the
genotype and
phenotype of
parents.
Proficient
Can correctly
label all parts of
a Punnett square
Skill 2: Use of
Punnett square
(10 points)
Can correctly
identify the
predicted
genotypic and
phenotypic
ratios(percents)
of offspring in
simple
dominance traits
Can correctly
identify predicted
genotypic and
phenotypic ratios
of offspring in
incomplete
dominance,
codominance,
and two trait
crosses
Given genotypes
of parents, can
correctly fill out
a Punnett square
Does not meet
Some parts are
mislabeled.
Shows confusion
about what
Punnett square
represents.
Can not create a
Punnett square
given the
genotypes of
parents.
Unable to
identify predicted
genotypic and
phenotypic ratios
of offspring in
simple
dominance traits
Complete the following before turning in.
Skill 1a: I believe I am at the _________________ level.
Skill 1b: I believe I am at the _________________ level.
Skill 2: I believe I am at the _________________ level.
Your score is based on how accurately you demonstrate your level.
Score (20 points) ________________