83 Meiosis

1
8-3 Meiosis
2

• Meiosis
• Forms sex cells (gametes/eggs and sperm)
• Reduces chromosome number by half (haploid)
• Two Parts
• Meiosis I
• Meiosis II

3
Meiosis I

• Reduces chromosome number by half
• Basic Terms
• Synapsis pairing of homologous chromosomes
• Tetrad pair of homologous chromosomes

4

• Crossing-over exchange of genetic material
  which results in genetic recombination

5

• Independent Assortment separation of homologous
  chromosomes

6
Meiosis II

• Similar to mitosis (sister chromatids separate)
  only it begins with cells containing the haploid
  number of chromosomes.

7
(No Transcript)
8
(No Transcript)
9
Formation of Gametes

• Males
• Spermatogenesis
• Testes

• Female
• Oogenesis
• Ovaries

10
Reproduction

• Asexual
• One parent
• Offspring genetically identical to parent

• Sexual
• Two parents
• Offspring genetically unique