Asexual vs. Sexual Reproduction Growth & Heredity Asexual vs. Sexual Reproduction

Warm-Up T/F Most kingdoms carry out both forms of reproduction. T/F Both sexual & asexual reproduction result in genetic diversity. T/F Sexual reproduction occurs less frequently in organisms than asexual reproduction does . T/F Asexual reproduction requires less energy.

Vocabulary 1. Sexual Reproduction 2. Meiosis 3. Diploid 4. Haploid 5. Fertilization 6. Somatic Cells 7. Gametes 8. Chromosomes 9. Asexual Reproduction 10. Binary Fission 11. Mitosis 12. Regeneration 13. Conjugation 14. Cloning Write the definition & 2 supporting statements using the glossary & index of text. Make flashcards with the information when you finish.

Sexual or Asexual? An amoeba cell divides into two identical cells. A female frog lays eggs to be fertilized by males in the water. Birds display courtship behaviors to attract a mate. Some worms are hermaphroditic. A sea star regrows a body part that was lost or damaged by a predator. Dissect the tail of a Planarian flatworm & it will grow 2 tails.

Sexual or Asexual? The ocean current carries sperm from one sponge to another. A hydra produces a “mini-me” bud off the side of its body. Conifers release pollen (sperm) from cones that later fuse with the ovum (egg) of another tree. Plant a leaf clipping from a petunia and watch a new plant grow.

These are examples of… While these are examples of… The ocean current carries sperm from one sponge to another. A female frog lays eggs to be fertilized by males in the water. Birds display courtship behaviors to attract a mate. Conifers release pollen from cones that fuse with the ovum of another tree. Worms can be hermaphroditic. Dissect the tail of a Planarian flatworm & it will grow 2 tails. An amoeba cell divides into two identical cells. A hydra produces a “mini-me” bud off the side of its body. Plant a leaf clipping from a petunia and watch a new plant grow. A sea star regrows a body part that was lost or damaged by a predator.

Definitions of Asexual v Sexual Reproduction Sexual reproduction = 2 parents, offspring are genetically different from parents (1/2 of your genes come from each parent) Asexual reproduction = not sexual or 1 parent, offspring are genetically identical to parent

Then add examples from the bottom of the page. Organisms to include: Amoeba, Bacteria, Bee, Beetle, Cactus, Chipmunk, Lizard, Daffodil, Hydra, Jellyfish, Lindens, Mallards, Mushroom, Paramecium, Petunia, Seal, Sponge, Starfish, Toad, Turkey.

Place these in the chart 1 parent Offspring identical to parents 2 parents Gametes formed Fragmentation Genetic variation No genetic variation

Place these in the chart Haploid cells Produce offspring Rapid increase of population Better in bad environments Mutations Production of offspring is slower

Place these in the chart Budding Binary fission Meiosis Mitosis Spore formation Vegetative propagation

Next……. With your lab partners, complete the similarities and differences on your chart.

Summary The Most Important Thing About Asexual Reproduction is…….. The Most Important Thing About Sexual Reproduction is….

Advantages Asexual Reproduction Doesn’t require specialized sex organs. Very rapid; produces large number of offspring. Requires less energy. More efficient form of propagation of the species. Sexual Reproduction Maintains genetic diversity that can lead to evolution. Organisms reproduce less frequently. Variety of genes increases species’ chances for survival & ability to adapt.