preworksheet2 - To avoid ambiguities in representation of...

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Genome 371, Spring 2008 Pre-worksheet for QS2—Meiosis Goals: This exercise is intended to increase your familiarity with ploidy, meiosis, and the important roles of segregation and crossing over in the generation of genetic diversity. After all, cell division is the moment of chromosome segregation and provides the underpinnings of all of genetic analysis. Part 1. Pre-worksheet: complete before arriving at quiz section. Label the parts of the photograph with the correct biological term (not “beads”, “rubberbands”, etc.). What is the ploidy of this cell? What event is this cell poised to undergo—mitosis? Meiosis I? Meiosis II? What are the steps that have to happen before that event can take place? 1. _______________ 2. _______________ 3. _______________ 6. _______________ 5. _______________ 4. _______________
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Part 2. Depicting chromosome segregation.
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Unformatted text preview: To avoid ambiguities in representation of segregating chromosomes, we will settle on a standard depiction of chromosomes and crossovers (ambiguous depictions will make you lose points on tests!). The left hand column below shows clear depictions; the ones on the right hand column all have problems. CLEAR figures AMBIGUOUS depictions I II III IV a locus with its position on chromosome and the allele designated a a alleles of the locus clearly labeled on each chromatid a a A A clear depiction of crossover location and chromatids involved Errors in meiosis diagrams The two diagrams are supposed to represent Metaphase I of meiosis in the RrYy diploid. Identify the error(s), if any, in each diagram. Part 3...
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This note was uploaded on 06/03/2008 for the course GENOME 371 taught by Professor Unsure during the Spring '03 term at University of Washington.

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preworksheet2 - To avoid ambiguities in representation of...

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