Transcript The “M” phase of the cell cycle. Is it Mitosis or Meiosis?

The “M” phase of the cell
cycle. Is it Mitosis or Meiosis?
Cell Division
2 kinds for 2 different types of
cells in living things.
What kind of cells?
• Mitosis
• Meiosis (SEX)
• Found in asexual Somatic
cells (body cells)
• plant and animal tissue
such as non-flowering
plants and body tissues
like toes, nose, ear,
stomach etc…
• Found in sexual cells
called Gametes (sperm
and egg)
• Plant and animal tissues
such as flowers, pine
cones, and body parts
related to sexual
reproduction.
Terms related to Mitosis and
Meiosis
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Mitosis
Asexual
Somatic
Identical daughter cells
Binary Fission (bacteria)
Conjugation (Protists like
amoebas and parameciums)
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Meiosis
Sexual
Gametes (sperm, eggs)
Polar bodies – nonfunctioning
eggs
• Diploid (2N) where “N”
represents the chromosome
number
• Haploid (N) sex chromosomes
½ the chromosomes number
given from Mom or Dad
Homologous chromosomes –
same size and same shape or
structure
Crossing over of genes in the
chromosomes
Crossing over of Homologous
Chromosomes
Compare Mitosis and Meiosis
• Both cell divisions go through the cell
cycle
• Both cell divisions undergo Prophase,
Metaphase, Anaphase, Telophase and
Interphase
• Both Mitosis and Meiosis are considered
the “M” phase of the cell cycle
Contrast Mitosis and Meiosis
• Mitosis
• Found only in somatic
cells
• Goes though cell
division 1 time
• Daughter cells have
identical DNA
• Meiosis
• Found only in sex
cells
• Goes through cell
division 2 times
• Final product are 4
sperms or for females
1 egg, 3 polar bodies
Images of Mitosis and Meiosis
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