More meiosis

Variation is produced in four ways

• Mutation
• Random alignment
• Crossing over
• Fertilization
  Variation is important for evolution.

Mendel's First Law: Law of Segregation

• Only one from each pair of chromosomes will be present in a gamete

Mendel's Second Law: Law of Independent Assortment

• Random segregation and assortment leads to genetically unique gametes