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12.2 – Chromosomes and DNA Replication

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Presentation on theme: "12.2 – Chromosomes and DNA Replication"— Presentation transcript:

1 12.2 – Chromosomes and DNA Replication

2 Section Outline 12–2 Chromosomes and DNA Replication
A. DNA and Chromosomes 1. DNA Length 2. Chromosome Structure B. DNA Replication 1. Duplicating DNA 2. How Replication Occurs :

3 Chromosome Structure of Eukaryotes
Section 12-2 Human cells contain over one meter of DNA! How? Human DNA has 4,639,211 base pairs Nucleosome Chromosome DNA double helix Coils Supercoils Histones Wrapped around proteins (histones and nucleosomes)

4 DNA Replication Section 12-2 Original strand DNA polymerase New strand
Growth DNA polymerase Growth Replication fork Replication fork Nitrogenous bases New strand Original strand

5

6 DNA replication


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