3

Structure and Organization of Genetic Material

CHAPTER OBJECTIVES
  • Characteristics and Structure Of DNA and Chromosomes—DNA Packaging and Chromosome some Condensation
  • Chromosomes and Sex Determination
CHARACTERISTICS AND STRUCTURE OF DNA AND CHROMOSOMES—DNA PACKAGING AND CHROMOSOME CONDENSATION

Structure of chromosomes

The chromosomes of eukaryotic cells are larger and more complex than those found in prokaryotes. Although linear, the DNA molecules in eukaryotic chromosomes are highly folded and condensed; if stretched out, some human chromosomes would be several centimeters long—thousands of times longer than the span of a typical nucleus. To package such a tremendous length of DNA into this small volume, each DNA molecule is coiled ...

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