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STD 11 - 2. Biology classification — BIOLOGY STD 11 Science — Question

Rajasthan BoardEnglish MediumSTD 11 ScienceBIOLOGYSTD 11 - 2. Biology classification1 Mark
MCQ
Dikaryon formation is the characteristic feature of
  • ✓
    ascomycetes and basidiomycetes.
  • B
    phycomycetes and basidiomycetes.
  • C
    ascomycetes and deuteromycetes
  • D
    phycomycetes and deuteromycetes
✓

Answer

Correct option: A.
ascomycetes and basidiomycetes.
a
In fungi (ascomycetes and basidiomycetes), kayrogamy 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.

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