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Meiosis
(The formation of Sex Cells)
The Purpose of Meiosis
The purpose of meiosis is to produce ________________________________ (sperm and egg cells) with
_____________________________________________________________________ as the original cell.
In humans, each gamete contains only ___________ chromosomes.
This ensures that when ____________________________ cells combine the resulting cell ____________
will have the same number of chromosomes as the original cell _________________________________.
Overview of Meiosis
•
During meiosis cells divide _______________, unlike
mitosis where there is only ___________ cell division.
•
As a result, _____ cells are produced instead of _______
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However, the process of meiosis is different in males and
females.
Spermatogenesis
(Formation of _________________________)
•
•
•
•
Pierre Elliot Trudeau, former Prime Minister of
Canada fathered a child when he was 72 years
old!
Meiosis
(The formation of Sex Cells)
Oogenesis
(formation of ______________________)
•
In females, meiosis takes place in the ___________
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Each time the cells split the cytoplasm is divided
_____________________________
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This results in ______________________________
__________________________________________
•
Only the __________________________ survives
and becomes an egg cell
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Unlike men, women are born with all of the egg
cells they will ever have! They release one egg a
month (on average) during menstruation. When all
of their eggs are gone they enter
______________________________.
Comparing Mitosis and Meiosis
Mitosis
Produces
# of chromosomes in the cells
produced
Cells produced are
Meiosis