4

3

2

1

0

Criteria:

Model shows an understanding of base pair basics

The model has two pairs of color-coded bases fitting like puzzle pieces.

The model has two pairs of color-coded bases.

The model has one pair of color-coded bases.

The model has four bases but not color coded nor matched.

Not present

Criteria:

Model has an understanding of sugar and phosphate basics.

Sugars and phosphates alternate on the sides of the DNA molecule.

Bases are attached to the sugars.

Sugars and phosphates alternate on the sides of the DNA molecule.

Sugars and phosphates are present, but may not alternate correctly.

The model contains the sides, but it is not clear if sugars and phosphates are present.

Not present

Criteria:

Model has a key.

The key identifies all components of DNA. (sugar, phosphate, adenine, thymine, guanine, cytosine)

The key identifies four bases (adenine, thymine, guanine, and cytosine).

The key identifies two or three components of DNA.

The key identifies one component of DNA.

Not present

Criteria:

Model has a double-helix shape.

The model has a double-helical (3-D) shape.

.

The model has a shape of a ladder (3-D) but not twisted

Criteria:

Model has a required length.

The model contains at least 16 base pairs.

The model contains at least 14 base pairs.

The model contains at least 10 base pairs.

The model contains at least 8 base pairs.

The model contains less than 8 base pairs.

Criteria:

Model is neatly constructed.

The model shows exceptional effort.

The model is neatly done.

Neatness of the model can be improved.

The model is very carelessly done.

TOTAL POINTS

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