11.4 Comparison
between mitotic and
meiotic cell divisions(Book 2, p. 11-21)
Ø
Similarities:
n
(1) DNA
has replicated before the beginning of both processes.
n Both involve nuclear division and
(2) cytoplasmic
division.
n
Both
involve the movement of chromosomes and the distribution of chromosomes among
daughter cells.
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Ø
Differences:
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Mitotic cell division
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Meiotic cell division
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|
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Place of occurrence
|
(3) Body
cells
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(4) Gamete
- producing cells
|
|
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Process
|
Number of cell division
|
(5) One
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(6) Two
|
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Pairing of homologous chromosomes
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(7) Occurs /
Does not occur
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(8) occur
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Separation of homologous chromosomes into daughter nuclei
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(9) Occurs/ Does not occur
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(10) occur
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Crossing over
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(11) does
not occur
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May occur
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Daughter cell
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Number produced
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(12) Two
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(13) Four
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Chromosome
number
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Same as parent cell
((14) Diploid /2n)
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Half of parent cell
((15) Haploid
/n)
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Genetic make-up
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(16)Same as / Different from parent cell and among daughter cells
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(17) different
from parent cell and among daughter cells
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Cell type
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Body cells
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(18) Gametes
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Importance
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Forms genetically identical
cells for:
n growth
n (19) repair
n (20) asexual
reproduction
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n Forms haploid
gametes for
(21) sexual
reproduction
n Produces (22)genetic variation that enhance the survival of the species
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