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Table 4.

Example of students' responses.

ItemPretest (Score)Posttest (Score)
Q8 Student A. Products are 4 cells, 3 new ones; all can reproduce to create new cells. (1) Student A. 4 daughter cells are the products of meiosis. The daughter cells have half the number of chromosomes as the parent. (4) 
 Student E. Blank. (0) Student E. You end up with 4 daughter cells. (2) 
Q17 Student A. Blank. (0) Student A. This would affect the daughter cell by giving it two of one chromosome and none of another causing a mutation in the daughter cells. Since the spindle fibers pull the chromosomes apart and move them to opposite sides so that the cell may divide, if this did not happen the cells would not separate and therefore cause a mutation. (4) 
 Student E. Blank. (0) Student E. Daughter cells may be deformed because I think the spindle fibers help the cell keep its shape. (2) 
Q23 Student A. Blank. (0) Student A. The mother and father must both have a recessive gene. The child inherited both of the recessive traits making them have a straight hairline. (4) 
 Student E. Child might not inherited that trait from either parents. (1) Student E. The mom or dad's parents may have had a straight hairline causing the child to have one. (2) 
Q24 Student A. Blank. (0) Student A. Ww, Ww, ww. (4)
graphic
 
 Student E. Ww, WW, ww. (2)
graphic
 
Student E. Ww, WW, ww. (4)
graphic
 
ItemPretest (Score)Posttest (Score)
Q8 Student A. Products are 4 cells, 3 new ones; all can reproduce to create new cells. (1) Student A. 4 daughter cells are the products of meiosis. The daughter cells have half the number of chromosomes as the parent. (4) 
 Student E. Blank. (0) Student E. You end up with 4 daughter cells. (2) 
Q17 Student A. Blank. (0) Student A. This would affect the daughter cell by giving it two of one chromosome and none of another causing a mutation in the daughter cells. Since the spindle fibers pull the chromosomes apart and move them to opposite sides so that the cell may divide, if this did not happen the cells would not separate and therefore cause a mutation. (4) 
 Student E. Blank. (0) Student E. Daughter cells may be deformed because I think the spindle fibers help the cell keep its shape. (2) 
Q23 Student A. Blank. (0) Student A. The mother and father must both have a recessive gene. The child inherited both of the recessive traits making them have a straight hairline. (4) 
 Student E. Child might not inherited that trait from either parents. (1) Student E. The mom or dad's parents may have had a straight hairline causing the child to have one. (2) 
Q24 Student A. Blank. (0) Student A. Ww, Ww, ww. (4)
graphic
 
 Student E. Ww, WW, ww. (2)
graphic
 
Student E. Ww, WW, ww. (4)
graphic
 
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