Bio 5 Cell Cycle

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Author:
mdizon
ID:
99316
Filename:
Bio 5 Cell Cycle
Updated:
2011-09-01 01:21:31
Tags:
physiology cell cycle mitosis meiosis
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Description:
The Cell Cycle
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  1. In what phase does a cell spend the most time?
    Interphase
  2. G1
    cell growth/expansion: growing membranes, organelles, cytoplasm, etc.
  3. S phase
    DNA synthesis: DNA is replicated
  4. G2
    final cell growth before entering M phase
  5. How many chromosomes are present in a human skin cell?
    46
  6. How many genomes are present in an egg cell?
    1
  7. Function of mitosis?
    produce identical daughter cells for growth, repair, and renewal
  8. prophase
    • 1. chromosomes condense
    • 2. nuclear envelope falls apart
  9. metaphase
    chromosomes line up at the equator
  10. anaphase
    sister chromatids are pulled to opposite ends of the cell
  11. telophase
    • 1. chromosomes loosen up
    • 2. nuclear envelope reforms
    • 3. cytokinesis pinches the cell in two and forms two daughter cells
  12. Function of meiosis?
    production of gametes
  13. prophase I
    • 1. chromosomes condense
    • 2. nuclear envelope falls apart
    • 3. homologous pairs form tetrads
    • 4. crossover occurs after tetrad formation
  14. metaphase I
    homologs line up one on either side of the equator in random assortment
  15. anaphase I
    homologs are pulled to opposite ends of the cell
  16. telophase I
    • 1. chromosomes loosen up
    • 2. nuclear envelope reforms
    • 3. cytokinesis pinches the cell in two, resulting in two genetically-distinct daughter cells
  17. prophase II
    • 1. chromosomes condense
    • 2. nuclear envelope falls apart
  18. metaphase II
    chromosomes line up at the equator
  19. anaphase II
    chromatids are pulled to opposite ends of the cell
  20. telophase II
    • 1. chromosomes loosen up
    • 2. nuclear envelope reforms
    • 3. cytokinesis pinches each cell in two, thus resulting in four genetically-distinct daughter cells
  21. Are the resulting daugher cells from meiosis haploid or diploid?
    haploid
  22. n refers to...
    the number of chromosomes in one genome
  23. define genome
    a complete set of all different types of a gene

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