Question

Life cycle of Saccharomyces cerevisiae is:

• A. Haplontic
• B. Diplontic
• C. Haplodiplontic
• D. None of the above

Answer 1

The Correct Option is C

• The “baker’s yeast,” or Saccharomyces cerevisiae, exhibits both haploid as well as diploid lifecycles according to the environment; hence, it is called to have a haplodiplontic lifestyle.
• However, the diploid phase is more common and occurs during normal conditions.
• HAPLOID PHASE: In this phase, yeast cells reproduce asexually through budding. small bud grows out of the parent cell (haploid), differentiates, leaves the parent cell, and then grows into an individual cell.
• This phase is followed only during stressful conditions.
• DIPLOID PHASE: In this phase, two haploid cells of opposite mating types fuse to form one diploid cell.
• After that, it may go through the process of budding or undergo meiosis to produce 4 haploid spores.

So, the correct option is (C): Haplodiplontic.