Single Choice

Life cycle of Saccharomyces ludwigii is

AHaplobiontic
BHaplodiplobionitc
CDiplobiontic
Correct Answer
DAll of the above

Solution

Three types of life cycle pattern are seen in the Saccharomyces (yeasts).
(i) Haplobiontic life cycle (Saccharomyces octosporus): The diploid (2n) stage is very short and is represented by zygote (2n) or ascus. Thus, the haploid (n)phase is long and diploid phase is short
(ii) Diplobiontic life cycle (Saccharomyces ludwigii): In this life cycle, the diploid (2n) somatic stage is elaborate and haploid (n) stage is very short being represented by ascospores (n).
(iii) Haplodiplontic life cycle (Saccharomyces cerevisiae): In this life cycle, haplophase (n) and diplophase (2n) are equally represented and alternate in regular succession.
Therefore, the correct answer is option C.


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