Question

Dikaryophase i.e., two nuclei per cell is found during the reproductive stage of:
a. Ascomycetes
b. Basidiomycetes
c. Phycomycetes
d. Deuteromycetes

• A. a and b
• B. c and d
• C. a and c
• D. b and d

Answer 1

The correct option is A a and b

Sexual reproduction in fungi involves the formation and the fusion of two gametes or their nuclei. Fusion involves the union of cytoplasms as well as nuclei. The former is called plasmogamy while the latter is called karyogamy.

In higher fungi, karyogamy is delayed and occurs just before meiosis. In the stage intervening between plasmogamy and karyogamy the cells often contain two nuclei or dikaryons (n+n). Such cells are called dikaryotic cells. The phase is known as dikaryophase which takes place in ascomycetes and basidiomycetes.