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Ch. 6 Notes: Genes and DNA ISN pg. 120

Ch. 6 Notes: Genes and DNA ISN pg. 120. I. What is DNA? A protein molecule that carries instructions for inherited traits. - Made of nucleotides - Nucleotides are made up of sugar, bases and phosphates

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Ch. 6 Notes: Genes and DNA ISN pg. 120

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  1. Ch. 6 Notes: Genes and DNAISN pg. 120 I. What is DNA? A protein molecule that carries instructions for inherited traits. - Made of nucleotides - Nucleotides are made up of sugar, bases and phosphates -Bases: Adenine, Guanine, Thymine and Cytosine (EX: A-T and C-G are the base pairs) II. DNA Copies: DNA must copy itself before it divides by splitting down the middle and unwind.

  2. Notes: Ch.6 (cont.) ISN pg. 120 III. DNA : described as double helix or a spiral ladder; fits inside the nucleus in bundles. - DNA coils around proteins to form chromatin - Chromatin are the long strands of DNA that is bundled up in the nucleus IV. Mutations: changes in the pieces of DNA 3 types of Mutations: Deletion – bases are missing Insertion – extra bases added c. Substitution – wrong bases are used to replace

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