Meiosis has two main purposes: to cut the chromosome number in half for sexual reproduction and to create genetically diverse gametes (sex cells) so offspring are not identical to their parents.

Core idea

  • Meiosis turns one diploid cell (with two sets of chromosomes) into four haploid gametes (with one set each), so that when egg and sperm fuse, the normal chromosome number is restored.
  • It also shuffles genetic information through crossing over and independent assortment, which increases variation in a population.

Why organisms “need” meiosis

  • Without meiosis, sexually reproducing organisms could not reliably pass on the correct chromosome number to the next generation.
  • The genetic variation produced by meiosis helps populations adapt to changing environments and resist diseases over time.

Quick Scoop

  • Produces gametes (sperm and eggs) for sexual reproduction.
  • Reduces chromosome number from diploid to haploid.
  • Generates new combinations of genes, making each gamete genetically unique.

Information gathered from public forums or data available on the internet and portrayed here.