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Meiosis

Meiosis. What is it?. The process where gametes are formed 2 stages of cell division (some similarities to the phases in mitosis) The chromosome number of the daughter cell is half of the parent cell A gamete has n number of chromosomes (a hapliod number)

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Meiosis

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  1. Meiosis

  2. What is it? • The process where gametes are formed • 2 stages of cell division (some similarities to the phases in mitosis) • The chromosome number of the daughter cell is half of the parent cell • A gamete has n number of chromosomes (a hapliod number) • Somatic cells (all other cells) have 2n number of chromosomes (a diploid number)

  3. Parents and Offspring • In humans, the haploid chromosome number is 46, and the diploid number is 23 • Offspring have genetic information from both of their parents (23 from each) • Each of the 23 chromosomes from the mother is matched with 23 chromosomes from the father

  4. Meiosis

  5. Homologous chromosomes • Paired chromosomes are called homologous chromosomes • Homologous chromosomes interact during meiosis and your characteristics are determined by how they interact • This interaction is called crossing over and happens during prophase I of meiosis

  6. Chromosome interaction

  7. Fertilization • During fertilization in humans, a haploid (n=23) sperm cell unites with a haploid (n=23) egg cell • A diploid (2n=46) zygote is produced from this union Zygote

  8. Meiosis I

  9. Meiosis II

  10. END

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