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Cell Reproduction

Home | 6-1 Chromosomes | 6-2 Mitosis and Cell Division | The Cell Cycle | 6-3 How Gametes Form: Meiosis | Vocabulary


Francis Crick's first sketch of the deoxyribonucleic acid double-helix.

Most human cells are frequently reproduced and replaced during the life of an individual. However, the process varies with the kind of cell. Somatic, or body cells, such as those that make up skin, hair, and muscle, are duplicated by mitosis. The sex cells, sperm and ova, are produced by meiosis in special tissues of male testes and female ovaries. Since the vast majority of our cells are somatic, mitosis is the most common form of cell replication.

On this site you are going to learn about Chapter Six. Chapter six deals with chromosomes, mitosis and meiosis.



  • Define Chromatin.

  • Describe the structure of a chromosome.

  • Distinguish between diploid and haploid cells.
  • Explain the significance of sex chromosomes.


  • Describe cell reproduction in bacteria and


  • Summarize the events of mitosis and


  • Define cell cycle. Describe a cell’s activities

during interphase.

  • Explain how cancer arises.


  • Define gamete, and state its function in

sexual reproduction.

  • Explain how meiosis maintains chromosomes

number throughout generations.

  • Summarize the events on meiosis.
  • Define crossing-over, and explain its

impact on evolution.

"Biology is the only science in which multiplication means the same thing as division."