1 / 8

Chlamydomonas

Chlamydomonas. Prepared by: Juliet Marie Theresa M. Villar. Chlamydomonas. Single celled green alga Grows in ponds, ditches, and wet soil believed to be primitive reproduces asexually by producing ZOOSPORES Reproduces sexually by producing ZYGOTES.

kacia
Download Presentation

Chlamydomonas

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. Chlamydomonas Prepared by: Juliet Marie Theresa M. Villar

  2. Chlamydomonas • Single celled green alga • Grows in ponds, ditches, and wet soil • believed to be primitive • reproduces asexually by producing ZOOSPORES • Reproduces sexually by producing ZYGOTES

  3. Parts of Chlamydomonas

  4. Life Cycle

  5. The zoospores grow into mature haploid cells, completing the asexual life cycle. These daughter cells develop flagella and cell walls and then emerge as swimming zoospores from the wall of the parent cell that had enclosed them. Asexual Reproduction A mature cell of Chlamydomonas is a haploid It resorbs its flagella and then divides twice by mitosis, forming four cells (more in some species)

  6. When the zygote breaks dormancy, Meiosis produces four haploid Individuals (two of each mating type) That emerges from the coat. They eventually grow into mature cells. MEIOSIS A mature cell of Chlamydomonas is a Haploid cell. This diploid zygote secretes a durable coat that protects the cell against harsh conditions Sexual Reproduction MITOSIS Fusion of the isogametes occurs slowly, forming a diploid zygote. After their release, gametes from opposite mating types (designated + and - ) pair off and cling together. Within the wall of the parent cell, mitosis produces many haploid Gametes.

  7. Some added notes: • ISOGAMY –literally means “a marriage of equals” • SPOROPHYTE –diploid individual that produce individual cells called spores (zoospores) • GAMETOPHYTE –haploid individual that produces gametes • HETEROMORPHIC Generations –sporophytes and gametophytes are structurally different • ISOMORPHICGenerations –sporophytes and gametophytes look alike, although they are different in chromosome number.

More Related