Grades 912 Performance Task
Contributed by: Kentucky Department of Education (KDE)
Description:
In this activity students will observe and analyze genetic data and
use the data to predict outcomes.
Each pair of students will observe and record genetic traits,
using a description of traits and a chart provided. Based on their
observations, the students will predict how selected traits could
be passed on to an offspring.
This task is designed to take students approximately 45 minutes
to complete. Up to 20 minutes may be spent working together in small
groups (2 or 4 students), and at least 25 minutes to complete the
individual work.
Overall Task Content Area:

 Life Science
Specific Knowledge Areas:

 The molecular basis of heredity
Performance Expertations:
 conducting investigations
 using equipment
 gathering, organizing, and representing data
 formulating conclusions from investigational data
 applying scientific principles to develop explanations and solve
new problems
National Science Education Standards:
8 C LS 2: Reproduction and heredity: Grades 58
2.4 Hereditary information is contained in genes, located
in the chromosomes of each cell. Each gene carries a single unit
of information. An inherited trait of an individual can be determined
by one or by many genes, and a single gene can influence more than
one trait. A human cell contains many thousands of different genes.
2.5 The characteristics of an organism can be described
in terms of a combination of traits. Some traits are inherited and
others result from interactions with the environment.
12 A SI 1: Ability necessary to do scientific inquiry: Grades
912
1.4 Formulate and revise scientific explanations and
models using logic and evidence. Student inquiries should culminate
in formulating an explanation or model. Models should be physical,
conceptual, and mathematical. In the process of answering the questions,
the students should engage in discussions and arguments that result
in the revision of their explanations. These discussions should
be based on scientific knowledge, the use of logic, and evidence
from their investigation.
(Use the "hot" link on the PALS home page
to check the full text of related National Science Education Standards,
if desired.)
National Council of Teachers of Mathematics:
DAP3: Develop and evaluate inferences and
predictions that are based on data:
Grades 912 g. understand how sample statistics reflect the
values of population parameters and use sampling distributions as
the basis for informal inference
DAP4: Understand and apply basic concepts of probability:
Grades 912 j. understand the concepts of conditional probability
and independent events
PS2: Solve problems that arise in mathematics
and in other contexts:
Grades 912
CNX3: Recognize and apply mathematics in
contexts outside of mathematics:
Grades 912
Materials:
At this station students should have:

 One Student Response Form for each student
One set of alleles per student pair
One cup per student pair
One information sheet per student pair
One calculator for each student
Sharpened pencils
Timing
The total time for this task is 45 minutes. Student work together
for up to 20 minutes performing the task and recording data in the
data table provided. At this point students should be instructed
to complete Questions #26 on the Student Response Formworking
alone.
Advance Preparation:
Each pair of students will need model alleles to use in this activity.
Each pair of students will need two round alleles labed "D", and two
round alleles labeled "d". They will also need two square alleles
labeled "D", and two squares alleles labed "d".
Visually impaired blind students should not participate in this
task.
Safety:
 Be careful.
 Teachers and students should always exercise appropriate safety
precautions and utilize appropriate laboratory safety procedures
and equipment when working on science performance tasks.
