Question

Which of the following type of life cycle is observed in Saccharomyces cerevisiae ?

• A. Haplontic
• B. Diplontic
• C. Haplo-diplontic
• D. Diplo-haplontic

Answer 1

The correct option is A Haplontic

This type of life cycle is represented by haploid and diploid phases, of more or less equal duration, found in Saccharomyces cerevisiae. The haploid cells of opposite mating type normally multiply by budding. Two such cells of opposite mating behave as gametangia and undergo fusion initially only plasmogamy takes place, wherein the nuclei exist separately also called the dikaryotic phase. Later on the nuclei undergo fusion in specialized sac like structures called the ascus to form a diploid zygote, which undergoes meiosis to release the haploid ascospores.

So, the correct answer is 'Haplontic'