Question

Given is the representation of life cycle of members of classes Ascomycetes and Basidiomycetes. Select the correct option for processes A, B and C.

	A	B	C
(a)	Karyogamy	Plasmogamy	Meiosis
(b)	Plasmogamy	Karyogamy	Meiosis
(c)	Plasmogamy	Meiosis	Karyogamy
(d)	Karyogamy	Meiosis	Plasmogamy

• A. a
• B. b
• C. c
• D. d

Answer 1

Answer: (B)

In Ascomycetes and Basidiomycetes, the life cycle is completed in three phases instead of two- haplophase, dikaryophase and diplophase (2n). Haplophase by plasmogamy converts into dikaryophase where each cell has two haploid nuclei. Then karyogamy occurs converting dikaryophase to diplophase. Meiosis occurs in diplophase and haploid condition is regained.