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Performance Task:
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Note to the teacher: Before performing this task,
the student should be familiar with the following terms: dominant,
recessive, genotype, phenotype, genetics, heredity, heterozygous, homozygous, trait. If they are
not, the terms should be reviewed.
It has long been known that every part and trait of your body was passed on
to you from previous generations. Some traits, such as eye and hair color, are more obvious than
others. Make a list of about ten human traits that are passed on from generation to generation. Identify
dominance and recessiveness for each trait.
Choose two of the traits listed that you can investigate in your family (or
in someone else's if you cannot use your own). Once you have selected the two traits, make a family tree
starting with yourself. Go back in your ancestry as far as you can. On either side of each of the individuals
listed on your family tree, write the traits that you are investigating. Below that give the phenotype and
possible genotype of each person. If you have the computer capability, you may wish to create the family tree
using the computer.
Your goal is to be able to predict not only what genotypes and phenotypes
are evident in your family, but also what traits you may pass on to your children. Using the information
you gathered while creating the family tree, predict what traits your children may exhibit and defend your
prediction in a short essay.
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Knowledge / Skills:
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Examine the foundations of genetics involving
heredity and inherited traits passed on through generations, understand the
gene-chromosome concept, and apply classical genetic studies (Mendelian
genetics). (s12)
Know the features of genetic patterns such as
sex inheritance and sex linkage and how dominant and recessive traits
explain variations that are hidden in one generation can be expressed in
the next. (s54)
Use expository writing skills in subjects other
than English language arts. (ela58)
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Rubric:
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Distinguished
All parts of the task are complete.
The
family tree is easy to read and understand.
The
family tree is very creative in its design.
All work
is free of mechanical and grammatical errors.
The
student demonstrates a thorough understanding of heredity and genetics.
Qualified
All parts of the
task are complete, but student needs some assistance from others.
The
family tree is easy to read and understand, but not particularly creative.
Work is
relatively free of mechanical or grammatical errors.
The
student demonstrates a good understanding of heredity and genetics.
Competent
All parts of the
task are attended to, but student needs considerable help from others.
The family tree is not complete and is
somewhat difficult to read.
Mechanical and/or grammatical errors detract from the work.
The
student demonstrates only a minimal understanding of heredity and genetics.
Inadequate
The student does
not complete the task.
The
partial family tree is difficult to comprehend; it has little meaning.
The
essay, if done, is poorly written with many grammatical errors.
The
student demonstrates little, if any, understanding of heredity and
genetics.
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