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Unformatted text preview: * Non-histons protein-provide structural support for the chromatin and help regulate gene activity Nucleosome DNA Replication In Cell Division The reasons for cell division * growth * repair * reproduction Two kinds of cell division * somatic cell division- mitosis * sex cell division- meiosis DNA Replication Replication begins at a Specific Sight on the Double Helix Mutations * Any change in the nucleotide sequence of DNA DNA & Cell Division * Three major types of mutations * alterations within a gene * abnormal numbers of chromosomes * too many or too few of a certain chromosome * abnormal chromosome structure * breakage leading to rearrangements Mutation (continued) * Alterations within a gene * base substitutions- the substitution of one nucleotide for another...
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