Assignment 4 - November 28, 2017
This assignment is worth 5% of the course grade. Due Tue. Dec. 5
- 1) (3 points) Chromosome pairing in a heterozygote for an
inversion is shown below. (For simplicity, an inversion loop
is avoided by drawing the termini unpaired.) Consider a set of
possible double crossovers. In all cases, one crossover event
occurs at position X. The example shows meiotic products
resulting from a second crossover at site 1. Draw the meiotic
products for the other possible crossover sites, 2, 3 or 4.
- 2) (2 points) The Brassica napus genome is
amphidiploid, containing two homoeologous genomes (AACC) which
are represented in B. rapa (AA) and B. oleracea
(CC). Suppose you wanted to assemble complete contigs,
consisting of partially overlapping BAC clones spanning the
entire length of each chromosome. Would it be easier to do
this in the amphidiploid B. napus, or in the diploid
species B. rapa or B. oleracea? Explain your
- Make sure your assignment report includes your name, student
number and UM email address.
- Save your assignment report as a PDF file, and upload it to
the PLNT3140 UMLearn dropbox site in the Assignment 4 folder.
Files in word processing formats (.doc, .docx, .rtf, .odt) are NOT
Note on grading: In assigning a grade, some consideration
may be given to how the answer communicates your ideas. Keep in
mind the following:
- use of precise and appropriate biological terms
- organization of ideas in your answer, so that a clear chain of
logic is apparent. Formatting tools such as s subheadings or
bullet points help to show the reader the structure of your
- ambiguity - Try to read your answers from the viewpoint of
your reader. Are there several possible ways to interpret what
you have said?
- Feel free to use figures or tables in cases where they will be
useful get across your ideas.
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