Meiosis Simulation with Pop Beads

Meiosis Simulation with Pop Beads - Modeling Meiosis 1....

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Meiosis Simulation with Pop Beads Note: You must know all the words in bold to truly understand meiosis. Building the unduplicated chromosomes 1. Construct the single unduplicated chromosomes you would find in the nucleus of a gonadal cell of a sexually reproducing organism with a diploid number of 4 (2n). 2. Make the paternal chromosomes in each homologous pair out of one color and the maternal chromosomes out of another color. Make the centromeres out of two pop beads that are the color of the other homolog . For example, if your maternal chromosomes are made of red beads and your paternal chromosomes are made of yellow beads, the centromere of the maternal chromosome should be made from two yellow beads. 3. Make the each of the arms of one pair of chromosomes 7 beads long and each of the arms of the other pair of chromosomes 4 beads long.
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Unformatted text preview: Modeling Meiosis 1. Take your chromosomes through the S phase of the cell cycle and prepare them for meiosis . 2. Arrange each homologous pair in synapsis . 3. Use pipe cleaner pieces to connect the sister chromatids at the centromere. 4. Take your chromosomes through all the stages of meiosis and find out how many different kids of gametes can be formed. What is the haploid number of this organism (n)? 5. Join another group and restore the diploid number with sexual reproduction. Modeling Crossing Over 1. Put your chromosomes back in synapsis. 2. Model crossing over with two pop beads between two sister chromatids of homologous pairs. 3. Take your chromosomes through all the stages of meiosis again and find out how many different kids of gametes can be formed....
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This note was uploaded on 04/21/2011 for the course BIO 105 taught by Professor Staff during the Winter '08 term at Grand Valley State University.

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