1 / 19

Mitosis and Meiosis

Mitosis and Meiosis. Objectives. By the end of today’s lesson, you will be able to: Define mitosis and meiosis Distinguish the differences between the cell division processes Recognize the cellular activity that takes place in the various phases of each. Cell Reproduction . Cell Cycle.

sharla
Télécharger la présentation

Mitosis and 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. Mitosis and Meiosis

  2. Objectives By the end of today’s lesson, you will be able to: • Define mitosis and meiosis • Distinguish the differences between the cell division processes • Recognize the cellular activity that takes place in the various phases of each

  3. Cell Reproduction

  4. Cell Cycle

  5. Mitosis: Asexual Reproduction

  6. Mitosis: Asexual Reproduction

  7. Diploid Cells Most plant cells are “diploid” – which means their chromosomes are paired. Diploid = two identical sets of chromosomes • For example: • A soybean plant has 40 chromosomes (20 pairs) • A corn plant has 20 chromosomes (10 pairs) Think of Mitosis as “Mi-two-sis”

  8. Mitosis: Asexual Reproduction 1. Prophase 2. Metaphase 4. Telophase 3. Anaphase

  9. Purpose of Mitosis Asexual cell reproduction in living organisms Replicated chromosomes are divided into two identical cells

  10. Three Minute Checkup Label the flowchart using the terms below. (1) (2) (6) (3) (4) (5) • parental cell Metaphase Telophase • daughter cells Prophase Anaphase

  11. Mitosis vs. Meiosis • Mitosis: • Involves the division of one parental cell • Produces two identical cells • Involves diploid cells (2N) with two sets of chromosomes • Meiosis: • Involves the division of two parental cells • Produces gametes (sex cells) • Involves haploid cells (N) with one set of chromosomes

  12. Meiosis Cellular Division During meiosis, the parental cell (or nucleus) will divide twice. As a result, each of these cells, will have only half the number of chromosomes, but each chromosome will contain genetic information from both parents.

  13. Meiosis – A Two Phase Process Meiosis is a two phase process: Meiosis I – Involves the phases of Prophase I, Metaphase I, Anaphase I, and Telophase I. It is a reduction division, in which each progeny cell has two chromosomes and two sister chromatids. Meiosis II – Involves Prophase II, Metaphase II, Anaphase II, and Telophase II. It is a normal mitotic division, in which the sister chromatids are separated and the number of chromosomes remain constant.

  14. Meiosis I Prophase I Metaphase I Anaphase I Telophase I

  15. Meiosis II Anaphase II Telophase II Metaphase II Prophase II

  16. Purpose of Meiosis Sexual cell reproduction in multi-cell organisms

  17. Three Minute Checkup

  18. Summary

  19. Questions

More Related