1 / 9

Candy Meiosis

Candy Meiosis. Objective: Use candy to make models of cell divisions of spermatogenesis & oogenesis. 1. Mitosis Somatic (body) cells Identical daughter cells created 1 division--> 2 diploid cells (46 chromosomes). 2. Meiosis Gametes (sex cells)

starr
Download Presentation

Candy Meiosis

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Candy Meiosis Objective: Use candy to make models of cell divisions of spermatogenesis & oogenesis.

  2. 1. Mitosis Somatic (body) cells Identical daughter cells created 1 division--> 2 diploid cells (46 chromosomes) 2. Meiosis Gametes (sex cells) New daughter cells are different from each other and the original 2 divisions--> 4 haploid cells (23 chromosomes) Introduction- Cell division

  3. Introduction- Meiosis Meiosis I • Chromosomes replicate (briefly quadraploid) • Homologous chromosomes pair up • Crossing over can occur • Chromosome number is haploid at end but chromosomes are still duplicated (X-shaped) Meiosis II • Just like mitosis • Sister chromatids separate

  4. 1. Spermatogenesis Male sex cells (pollen/sperm) 4 sperm produced Equal distribution of cytoplasm and organelles 2.Oogenesis Female sex cells (ova, ovules) 1 ovum and 3 polar bodies produced egg gets virtually all the cytoplasm & organelles Introduction- Meiosis

  5. New input page • Title: Candy Meiosis • Divide into 4 panels • Label panels “beginning”, “after meiosis 1”, “after meiosis 2 sperm”, “after meiosis 2 egg” • As you proceed following teacher directions, draw results in each panel. • Label chromosomes, organelles, diploid cell, haploid cell • OUTPUT page tonight: compare/contrast spermatogenesis & oogenesis via paragraph, venn diagram or concept map

  6. To Do and Notice • Pick up a tray. Do not eat the candy until you’ve completed the activity. • Use string to create a cell membrane and a nuclear envelope. • Use 2 colors of gummy worm to make chromosomes that are replicated and arranged in homologous pairs. Where should they go? • Spread the remaining candy around the cytoplasm. • Cut the nuclear envelope into 4 pieces and set aside. • Cut the cell membrane into 2 pieces and form 2 new circles. For oogenesis, uneven sizes, for spermatogenesis, equal sizes

  7. To Do and Notice 7. Each new cell gets a replicated chromosome (gummy worm X). What has happened to the amount of genetic material in each cell? 8. Divide the candy appropriately between the 2 cells depending upon whether you are making eggs or sperm. 9. Cut the strings again to make 4 cell membranes. Where does the candy (organelles) go? Separate sister chromatids- one per cell. 10. Show me the final product, after you use the pieces of the original nuclear envelope to make 4 new ones and get a stamp in your notebook.

  8. To Do and Notice • OK, now you can eat the candy. • Clean up by throwing away string and extra candy pieces. Put scissors back on the trays and return them to the back of the room.

More Related