anp2 lab

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Author:
cgat45
ID:
179225
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anp2 lab
Updated:
2012-10-22 23:01:03
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mitosis meiosis
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lab
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  1. prophase
    chromosomes condense from chromatin and the cell membrane disappears
  2. metaphase
    chromosomes line up along the cells equator
  3. anaphase
    sister chromatids on each chromosome separate, and begin to move towards the poles of the cells
  4. telophase
    chromosomes reach the poles of the cell, begin to unwind, and then assume the form of chromatin
  5. cytokinesis
    division of the cytoplasm is not part of mitosis, but it usually occurs at the same time, here, the cells divides in half, each half receives approximatley half of the cytoplasm
  6. interphase
    the chromosomes take the form of chromatin during thei phase, and they replicate to produce the two chromatids
  7. prophase 1
    chromatin condenses to form the chromosomes. the homologous chromosomes form pairs in an even called synapsis. chromosomes can cross over during synapsis. during cross over the chromatids of homologus chromosomes can echange segment of the chromatid. the result of cross over is siter chromatids of one chromosome are no longer genetically identical. cross over is one of the mechanisms that generates genetic variability. teh nuclear envelope disappears and the spindle apparatus forms during late prophase 1
  8. metaphase 1
    the homologous chromosomes pair allong the wquatorial plane of the cell so each homolog is on the oposite side of the plane.
  9. anaphases 1
    the homologous chromosomes separate, and are drawn to the opposite poles of the cell
  10. telophase 1
    the homologous chromosomes reach the opposite poles of the cell and cytokinesis occurs. the resulting two cells each have the haploid number of chromosomes
  11. meiosis 11
    meiosis II consists of prophase, metaphase, anaphase, and telophase. the only notable event to occur in meiosis II is the separation of the two chromatids of each chromatids of each chromosome, this reults in four haploid cells, each containing 23 different chromosomes. otherwise meiosis II is very similar to mitosis
  12. chromatin
    it literally means colored material. this is the term for the uncoiled dna in the nucleus when the cell is undergoing its normal activity. the chromatin coils form the chromosomes
  13. chromosomes
    literally means colored bodies. these are the rod shaped structures of dna present in the cell during cell division.
  14. chromatids
    the two identical strands of dan which form a chromosome after dna replication. the chromatids are separated into two different cells during mitosis
  15. haploid
    the number of chromosomes found in eggs or sperm. it is one half of the diploid number of chromosomes. the haploid nuber of chromosomes in humans is twenty three
  16. diploid
    having two haploid sets of homologous chromosomes. the normal number of chromosomes in body cells. humans have a diploid number of 46 chromosomes
  17. homologous chromosomes
    chromosomes identical in size, shape, and possess the same genes. humans have twenty three pairs of homologous chromosomes

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