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Reproduction

Reproduction. 2 Types of Reproduction. Asexual reproduction- when an organism copies it’s own DNA to produce genetically identical offspring. 2. Sexual reproduction- division - the combining of DNA from two parents to form a genetically unique and different offspring.

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Reproduction

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  1. Reproduction

  2. 2 Types of Reproduction • Asexual reproduction- • when an organism copies it’s own DNA to produce genetically identical offspring 2. Sexual reproduction- division - the combining of DNA from two parents to form a genetically unique and different offspring

  3. DNA-(deoxyribonucleic acid )- • the genetic material found in the nucleus of all living cells; contains the information needed for an organism to grow, maintain itself, and reproduce • when an organism reproduces it passes on this genetic information

  4. Asexual Reproduction A new organism is produced from one organism uniform offspring- offspring from asexual reproduction are identical to the parent (look just like the parent)

  5. Asexual Reproduction • Types: • Binary Fission • Budding • Regeneration • Vegetative Propagation

  6. Binary Fission One organism (does not have a nucleus) divides into two organisms Ex: bacteria, many algae, protozoa

  7. Budding New organism grows from the surface of the body of the parent Ex: yeast

  8. Regeneration New organism grows from pieces of the parent organism Ex: planaria, star fish

  9. Vegetative Propagation New cells separate from the parent and form a complete new individual organism Ex: plant cuttings, potato

  10. Sexual Reproduction Two sex cells come together (egg & sperm)

  11. Sexual Reproduction Requires two organisms to produce offspring diverse offspring - offspring from sexual reproduction that share characteristics from both parents

  12. Sexual Reproduction- continued • Fertilization - joining of egg cell and sperm cell • Zygote - New cell formed from fertilization • (egg + sperm = zygote)

  13. Reproduction Asexual (1 parent) Same DNA – no variety; looks just like parent Sexual (2 parents) Variety in offspring Gamete (egg) 23 chromosomes Gamete (sperm) 23 chromosomes Sex cells Fission Budding Regeneration fertilization Forms a ygote – which has 46 chromosomes (new DNA)

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