Genetics USD Ch2

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Author:
Mattyj1388
ID:
199747
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Genetics USD Ch2
Updated:
2013-02-13 01:56:39
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Genetics USD Ch2
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General information from "Genetics, a conceptual approach 4th" ISBN 1-4292-3250-1 Chapter 2
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  1. The 2 simple rules for counting chromosomes
    • 1) to determine the number of chromosomes, count the number of functional centromers.
    • 2) to determine the number of DNA molecules, first determine if sister chromatides are present. If sister chromatids are present, the chromosome has replicated and the number of DNA molecules is twice the number of chromosomes. If sister chromatides are not present, the chromosomes has not replicated and teh number of DNA molecules is the same as the number of chromosomes. 
  2. Diploid
    (most cells) carry two sets of genetic information.
  3. Haploid
    Cells with a single set of chromosomes.
  4. Viruses
    Are neither prokaryotic nor eukaryotic, because they do not posses a cellular structure.
  5. Parts of chromosomes
  6. Number of Chromosomes and DNA molecules per cell in G1 Stage.
    • Chromosomes  8
    • DNA molecules 8
  7. Number of Chromosomes and DNA molecules per cell in G2 Stage.
    • Chromosomes  8
    • DNA molecules 16
  8. Number of Chromosomes and DNA molecules per cell in Metaphase of mitosis Stage.
    • Chromosomes  8
    • DNA molecules 16
  9. Number of Chromosomes and DNA molecules per cell in Anaphase of mitosis Stage.
    • Chromosomes  16
    • DNA molecules 16
  10. Number of Chromosomes and DNA molecules per cell in after cytokinesis of mitosis Stage.
    • Chromosomes  8
    • DNA molecules 8
  11. Number of Chromosomes and DNA molecules per cell in Metaphase I of meiosis Stage.
    • Chromosomes  8
    • DNA molecules 16
  12. Number of Chromosomes and DNA molecules per cell in Metaphase II of meiosis Stage.
    • Chromosomes  4
    • DNA molecules 8
  13. Number of Chromosomes and DNA molecules per cell in after cytokinesis of meiosis II Stage.
    • Chromosomes  4
    • DNA molecules 4

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