Meiosis

1
Meiosis

• Gamete Production

2
Meiosis

• _______ in many ways to ______
• Several differences however
• Involves ________________
• Results in _______with ___________________________
  ______
• Vocabulary
• ____________- Normal amount of genetic material
• ____________- 1/2 the genetic material.

3
Meiosis

• Meiosis results in the ____________
  _____________________________
• In Humans, these are the_____ (egg) and _______.
• Ova are produced in the ________ in females
• Process is called ________
• Sperm are produced in the ______ of males.
• Process is called _____________
• Meiosis occurs in 2 phases ________ _________

4
Spermatogenesis Oogenesis
Sperm formation
Egg formation
5
Meiosis I

• Prior to division (_______), amount of
  ____________

6
Metaphase I

• During ___________ homologous chromosomes line-up
  along the metaphase plate or _________
• Areas of homologous chromosomes connect at areas
  called __________
• __________________________________________

7
Crossing Over

• _____________________________________________and
  reattach at similar locations.
• Results in ___________________________of
  offspring.
• _____________________________________________

8
Chiasmata
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Anaphase I

• During Anaphase I, each __________ ____________
  is pulled to opposite sides of the cell.
• Unlike mitosis, the ______________________________
  ____________
• Nuclei MAY OR MAY NOT reform following division.
• ______________ may or may not occur.

10
Meiosis II

• DNA DOES NOT double
• Chromosomes randomly line-up along metaphase
  plate like regular mitosis.
• During Anaphase II, CENTROMERES BREAK and each
  SISTER CHROMATID is pulled to opposite sides of
  the cell.
• Nuclei reform and cytokinesis usually occurs
  (although it is often unequal).

Sister chromatids
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Overview of Meiosis