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Question
A dikaryon is formed when ______.
Options
Meiosis is arrested
The two haploid cells do not fuse immediately
Cytoplasm does not fuse
None of the above
Solution
A dikaryon is formed when the two haploid cells do not fuse immediately.
Explanation:
In some fungi, the fusion of two haploid cells immediately results in diploid cells (2n). However, in other fungi (ascomycetes and basidiomycetes), an intervening dikaryotic stage (n + n, i.e. two nuclei per cell) occurs. Such a condition is called a dikaryon and the phase is called dikaryophase of fungus. A dikaryotic cell has two dissimilar haploid nuclei.
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