Download Compare and Contrast – Mitosis and Meiosis

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Reproduction Compare and Contrast KEY
Fill out the chart below.
Answer the following question in at least 3 complete sentences.
Which is most important or valuable to a living thing, mitosis or meiosis? Explain in at least 3 complete sentences.
*justify your opinion here*__________________________________________________________________________________________________
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Characteristic
Type of Reproduction
Asexual
MITOSIS
Sexual
Types of organisms
All – bacteria, protists, fungi, plants, animals, humans
All – bacteria, protists, fungi, plants, animals, humans
Uses
Growth and development: grow new cells, replace old
cells, repair damaged cells
Make offspring: create new, unique organisms
Types of Cells
All cells except the sex cells
The sex cells (gametes),sperm egg
Number of Cells to Start
1
1
Number of Chromosomes in
the First Cell
Number of Cells Produced
In humans, 46
In humans, 46
2
4
Interphase (DNA copied)
Yes, exact copy unless mutation occurs
Number of Chromosomes in
Each New Cell
DNA Characteristics
In humans, 46
Yes, but then the cells split again separating the
chromosomes so that ½ of the DNA goes into each of
the final cells
In humans, 23
Examples
Binary fission in bacteria; regeneration in sea star;
budding in plants; spores in mushrooms
Benefits
No mate needed; rapid re-population; no long term
gestation
Not diverse; offspring have the same DNA making all
organism susceptible to the same diseases and
disorders; lack of species adaptability
Disadvantages
Diversity in species means the species is more likely to
survive
Must have a mate; the zygote (fertilized egg takes a long
time to develop (gestate)
Exact copy unless mutation occurs
MEIOSIS
Yes, but then the cells split again separating the
chromosomes so that ½ of the DNA goes into each of
the final cells
Pollinated flowers or cones in plants producing seeds;
zygote produced in humans; eggs in a bird’s nest