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Meiosis: sexual reproduction

Meiosis: sexual reproduction. Heredity and variation The science of genetics. Parents pass on genetic information to offspring. Genes (DNA) Gametes- reproductive cells haploid Somatic cells contain entire set of genes diploid. Asexual vs sexual reproduction.

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Meiosis: sexual reproduction

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  1. Meiosis: sexual reproduction Heredity and variation The science of genetics

  2. Parents pass on genetic information to offspring • Genes (DNA) • Gametes- reproductive cells • haploid • Somatic cells contain entire set of genes • diploid

  3. Asexual vs sexual reproduction • Asexual: offspring identical to (single) parent • Sexual: offspring are combination from two parents

  4. A diploid set of chromosomes

  5. Properties of chromosomes

  6. The human life cycle

  7. …and others

  8. Meiosis: chromosomal reduction

  9. Meiosis vs mitosis • Purpose • Types of cells • What type of cells and how many? • Behavior of chromosomes

  10. Comparison of mitosis and meiosis (summary)

  11. Sources of genetic variation: independent assortment

  12. Crossing over

  13. Summary • Sexual reproduction increases genetic variation • Asexual reproduction: offspring are identical to parents (except for mutation) • Meiosis forms gametes: reductional division • Independent assortment • Crossing over • Mutation • These fuse to form zygotes

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