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Biology Question on biological classification

Life cycle of Saccharomyces cerevisiae is:

A

Haplontic

B

Diplontic

C

Haplodiplontic

D

None of the above

Answer

Haplodiplontic

Explanation

Solution

  • 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.