Question

A fungus contains cells with two nuclei from different genomes. The nuclei do not fuse but divide independently and simultaneously as new cells are formed. It belongs to [JIPMER 1983]
A) Phycomycetes
B) Zygomycetes
C) Deuteromycetes
D) Basidiomycetes

Answer 1

The answer to your question is B

Answer 2

A fungus contains cells with two nuclei from different genomes. The nuclei do not fuse but divide independently and simultaneously as new cells are formed. It belongs to D) Basidiomycetes.

Reproduction in basidiomycetes:

• Basidiomycota have mutually indistinguishable, compatible haploids that are often mycelia made up of filamentous hyphae.
• Typically, haploid Basidiomycota mycelia merge by plasmogamy, and compatible nuclei move into each other's mycelia to couple up with the resident nuclei.
• Karyogamy is postponed so that compatible nuclei stay in pairs, which is known as a dikaryon. The hyphae are then described as dikaryotic.
• Some Basidiomycota, on the other hand, are obligatory asexual reproducers.
• Basidiomycota that reproduce asexually (discussed below) can usually be identified as belonging to this division by their gross similarity to others, the formation of a distinctive anatomical feature (the clamp connection), cell wall components, and, finally, phylogenetic molecular analysis of DNA sequence data.

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