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Cells and DNA

Cells, genes, and chromosomes

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Please choose from the following list of questions for basic information about cells and an explanation of DNA, genes, and chromosomes.

Choose a topic or view all topics on one page.

  1. What is a cell?
  2. What is DNA?
  3. What is mitochondrial DNA?
  4. What is a gene?
  5. What is a chromosome?
  6. How many chromosomes do people have?

Next: What is a cell?

Published: January 23, 2009