Genetics Making a model of DNA. Objective: I can discuss how cells pass on Genetic Information.

Color the individual structures on the worksheets as follows: Adenine = red Guanine = blue Phosphate = brown Thymine = green Cytosine = yellow Deoxyribose = purple

Using the small symbols (squares, circles, and stars) Line up the bases, phosphates and sugars. Glue the appropriate pairs together to form a nucleotide.

Construct the right side of your DNA model Put together in sequence a: cytosine, thymine, guanine and adenine nucleotide.

Chargaff’s Rule Adenine Thymine Adenine must pair with Thymine GuanineCytosine Guanine must pair with Cytosine about the same Their amounts in a given DNA molecule will be about the same. G C TA

DNA Double Helix P P P O O O P P P O O O G C TA

Construct left side of you DNA model Create the complementary nucleotide sequence that matches with the right side. A  T G  C

Use the remaining Nucleotides Add to your DNA model. Make sure you have the correct base pairs.