Plants & Human Affairs (BIOL106)  -  Stephen G. Saupe, Ph.D.; Biology Department, College of St. Benedict/St. John's University, Collegeville, MN 56321; ssaupe@csbsju.edu; http://www.employees.csbsju.edu/ssaupe

RCBr Pod Size Lab: Pre & Post-Lab Assignments

Pre-Lab Assignment:

1. Print and read copies of the Pod Expansion in RCBr & Growing Techniques for RCBr handouts

Post-Lab Assignment:  At the conclusion of this experiment:

1. Turn in Fig's. 1 & 2.
    
2. Type an answer to the following questions:

1. Who is responsible for the color of the seed? Mom, dad or junior (seed)?  Explain.
2. Do the seeds in a single pod have the same mother? the same father? same grandmother? Explain.
3. What is the relationship of the seeds in a single pod to one another? siblings, cousins, etc.? Explain.
4. Can the mother of the seeds in a pod also be the father? Explain.

3. On a separate sheet of paper, complete Table 1, 2 & 3.
    
4. Plot a frequency distribution of pod length (Figure 1).
    
5. Plot a scattergraph (Figure 2) showing the regression line and correlation coefficient
    
6. Restate your hypothesis concerning seed number and pod length and explain the rationale for this hypothesis.  Do our data support or reject this hypothesis?  Explain.
    
7. Ultimately, pod length is likely to be controlled by plant growth hormones.  Postulate a mechanism by which hormones, fertilization, and seed development could interact to control pod elongation.  Hint: check the references/links provided.

Last updated:  07/30/2005 / � Copyright  by SG Saupe