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Do Now- work with table

Do Now- work with table. Given the color scheme below: Cell membrane – chalk Chromosomes/chromatin (DNA) – orange Centrioles - yellow Spindle Fibers - purple Centromere – red Nucleus – green Re-create prophase on your desk. Asexual vs. Sexual Reproduction. Make a Venn Diagram.

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Do Now- work with table

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  1. Do Now- work with table • Given the color scheme below: • Cell membrane – chalk • Chromosomes/chromatin (DNA) – orange • Centrioles - yellow • Spindle Fibers - purple • Centromere– red • Nucleus – green • Re-create prophase on your desk

  2. Asexual vs. Sexual Reproduction

  3. Make a Venn Diagram Asexual Reproduction Sexual Reproduction Both Types of reproduction in living organisms Pass DNA from parent to offspring

  4. Asexual Reproduction • Requires only one parent • Offspring have 100% the same chromosomes as the parent. • In other words, the offspring are exact “clones” of the parent. • Most unicellular organisms reproduce this way. • Mitosis • Movie

  5. Asexual Reproduction • Binary Fission • Bacteria • Protists Binary fission is a form of asexual reproduction where every organelle is copied and the organism divides in two.

  6. Asexual Reproduction • Plant cuttings Vegetative reproduction is a type of asexual reproduction in plants that relies on multi-cellular structures formed by the parent plant.  It has long been exploited in horticulture and agriculture, with various methods employed to multiply stocks of plants.

  7. Asexual Reproduction • Budding • Hydra • Movie Budding is a means of asexual reproduction whereby a new individual develops from an outgrowth of a parent, splits off, and lives independently.

  8. Asexual Reproduction • Fragmentation Fragmentation is a means of asexual reproduction whereby a single parent breaks into parts that regenerate into whole new individuals.

  9. Asexual Reproduction • Regeneration Regeneration occurs when a body part has broken off and the organism grows a new one.

  10. Asexual Reproduction • Examples of organisms that reproduce asexually • Hydra • Sea Star • Strawberry • Bacteria • Euglena • Paramecium • Yeast

  11. Sexual Reproduction • Requires two parents that each share ½ of the genetic information. • Offspring share the characteristics of each parent. • Meiosis

  12. Sexual Reproduction • All the members of the Animal Kingdom • Fish • Mammals • Amphibians • Birds • Reptiles • Insects • Crustaceans

  13. Sexual Reproduction • Plant Kingdom • Flowers are the reproductive organs of plants. • Some flowers have both male and female reproductive organs on the same flower. Male flower Female flower

  14. Sexual Reproduction • Examples of organisms that reproduce sexually • Chickens • Iguanas • Lobsters • Sharks • Humans • Butterflies • Sunflowers • Roses

  15. Sexual Reproduction • Happens 2 ways • Internally (inside) • The egg is fertilized by sperm inside the female • Mammals, birds, reptiles, insects, spiders • Externally (outside) • The egg is fertilized by sperm outside the female • The female lays the eggs and then the male fertilizes them. • Fish and some amphibians • Plants and fungi (pollen and spores)

  16. Sex cells vs Body cells • Body Cells • Called “somatic” cells • Divide by cell division (mitosis) • Growth, repair, and maintenance of the body • Sex Cells • Called “gametes” • Include sperm (male) and egg (female) in humans • Divide by meiosis • Each gamete contains only half the number of chromosomes (haploid) • When the gametes join, the offspring will have a full set of chromosomes (diploid)

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