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Search > Learning Exercise Results > FlyLab assignment #3 rubric for part 3

Learning Exercise: FlyLab assignment #3 rubric for part 3

Title:
FlyLab assignment #3 rubric for part 3
Material:
Description:
A grading rubric for a large mapping prblem involving several genes
Course: Genetics

Info

Submitted by:
Jeff Bell
Date Last Modified:
September 04, 2000

Exercise

Virtual FlyLab Experiments Set III,


Problem 3: Scoring Rubric



(changes from VF III, problem 2 are in bold)

















Exemplary Report: 15 pts.


An exemplary report will have the following
characteristics




  • All crosses are diagramed both
    phenotypically and genotypically with clear
    symbols that reflect the hypothesized
    inheritance pattern.

  • After each cross the results are analyzed
    and there is a clear statement of the students
    current hypothesis.

  • Predictions based on the hypothesis are made
    for the each cross before doing the cross
    and the crosses chosen are appropriate for
    testing the current hypothesis.

  • Hypotheses are tested statistically using
    the chi-square test in an appropriate manner

  • Chi-square results are understood and are
    correctly interpreted

  • Student rejects all hypotheses not supported
    by the evidence and proposes new hypotheses.

  • Crosses involving multiple traits
    simultaneously are used and the student shows an
    understanding of independent assortment by
    correctly predicting the results if independent
    assortment is true

  • If independent assortment does not hold
    student can tell when linkage between traits
    might be involved, and knows how to test for
    this

  • Student can correctly and simply
    determine which genes are members of the same
    linkage group


  • Gene order, linkage distances and any
    interference can be correctly calculated for
    all genes that are members of the same linkage
    group


  • There is a conclusion that correctly
    explains the inheritance pattern for the traits,
    with supporting evidence, or a conclusion that
    clearly describes why all reasonable hypotheses
    can not explain the results, with supporting
    evidence.

  • If all known hypotheses are inadequate,
    student shows some creativity in coming up with
    at least one alternative hypotheses to test.

  • The report shows a clear understanding of
    the genetics covered up to this point in class
    that is applicable to this problem, is neat and
    well organized, with no superfluous or
    unexplained crosses.


Satisfactory Report: 12 pts.


A satisfactory report will have the followingcharacteristics




  • All crosses are diagramed both
    phenotypically and genotypically with clear
    symbols that reflect the hypothesized
    inheritance pattern.

  • After each cross the results are analyzed
    and there is a clear statement of the students
    current hypothesis.

  • Predictions based on the hypothesis are made
    for the each cross before doing the cross
    and the crosses chosen are appropriate for
    testing the current hypothesis.

  • Hypotheses are tested statistically using
    the chi-square test in an appropriate manner

  • Chi-square results are understood and are
    correctly interpreted

  • Student rejects all hypotheses not supported
    by the evidence and proposes new hypotheses.

  • Crosses involving multiple traits
    simultaneously are used and the student shows an
    understanding of independent assortment by
    correctly predicting the results if independent
    assortment is true

  • If independent assortment does not hold
    student can tell when linkage between traits
    might be involved, and knows how to test for
    this

  • Student can correctly determine which
    genes are members of the same linkage group
  • Gene order, linkage distances and any
    interference can be calculated for all genes
    that are members of the same linkage group, but
    some errors are made


  • There is a conclusion that correctly
    explains the inheritance pattern for the trait,
    with supporting evidence, or a conclusion that
    clearly describes why all reasonable hypotheses
    can not explain the results, with supporting
    evidence.

  • The report is not always clearly written and
    has inappropriate crosses or crosses that are
    not well explained, but does include the
    appropriate crosses and does explain what is
    going on.


Serious Flaws But Nearly Satisfactory: 9 pts.


A nearly satisfactory report will have the
following characteristics




  • All crosses are diagramed both
    phenotypically and genotypically with clear
    symbols that reflect the hypothesized
    inheritance pattern.

  • Does not always have predictions for what
    will happen in a cross and doe s not discuss the
    results from all crosses.

  • Has at least tested the most likely
    hypotheses and shows a basic knowledge of the
    appropriate genetics.
  • Hypotheses are tested statistically using
    the chi-square test but the test may not always
    be applied correctly

  • Crosses involving multiple traits
    simultaneously are used and the student shows an
    understanding of independent assortment by
    correctly predicting the results if independent
    assortment is true

  • If independent assortment does not hold
    student can tell when linkage between traits
    might be involved, and knows how to test for
    this, but may not be able to correctly determine
    order or distances

  • Distances and order for some genes is
    correctly determined but student is easily
    confused by traits with unusual inheritance and
    sometimes includes unlinked genes by mistake


  • Has a conclusion with supporting evidence
    and has clearly tried to solve the problem, but
    may not have a complete solution.


Begins, But Fails to complete Problem: 6 pts.


An incomplete report will have the following
characteristics




  • All crosses are diagramed both
    phenotypically and genotypically with clear
    symbols that reflect the hypothesized
    inheritance pattern.

  • Can not make reasonable predictions of the
    results of a cross, especially when more than
    one trait is involved, and can not always tell
    whether a cross supports or refutes a hypotheses
    but does know what some of the hypotheses should
    be.

  • Attempts to do the chi-square but clearly
    does not understand how to properly use or
    interpret the chi-square test

  • Does not know how to tell which genes are
    linked and has many errors in gene map



Unable to Begin Effectively: 3 pt.


A poor report will have the following
characteristics




  • Can not properly distinguish between
    phenotype and genotype

  • Can not diagram cross or make reasonable
    predictions based on a Mendelian hypothesis.

  • Can not set up chi-s quare

  • Does not understand independent
    assortment


  • Does not understand linkage or linkage
    groups


  • Can not determine gene order


No Attempt: 0 pts.



Disciplines

Audience

  • College Upper Div Major

Topics

linkage, mapping

Type of Task

  • Core activity
  • Student-centered
  • Team
  • Unsupervised