Allow 1 credit for correctly completing the Punnett square. NOTE: Base your evaluation on the
information that the student provides on the outside of the square. If the student was not correct
above, score this part of the question based on the genotypes the student used. This credit is
awarded for an understanding of the process rather than the knowledge of genotype.

Examples:

1 ] Allow 1 credit for the answer 2 or the answer sexual reproduction.

28 [1 ] Allow 1 credit for the answer green plant.

29 [1 ] Allow 1 credit for the answer grasshopper.

30 [1 ] Allow 1 credit for any of these answers:

frog
snake
owl

31 [1 ] Allow 1 credit for the answer mouse.

32 [1] Allow 1 credit for a scientifically accurate explanation.

Examples:

• If there were no snakes, there would be an increase in the number of frogs 
  because snakes prey on frogs. If there were more frogs, there would be a
  decrease in the number of grasshoppers, because the frogs eat the 
  grasshoppers.

•  If there were no snakes, there would be an increase in the number of mice 
  because snakes prey on mice. If there were more mice, there would be a 
  decrease in the number of grasshoppers, because the mice eat the grasshoppers.

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