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Match the following and choose the most appropriate option: (each option on both columns can be matched to multiple option on the another side ie right or left) eg. A-1,2 ; B,C,D-3 ; A,B,C-3,4

A. fusion of two haploid cells leads to 1. dikaryon
B. condition with two nuclei per cell 2. intervening dikaryotic stage
C. the phase with two nuclei per cell 3. immediately results in diploid cells
D. haploid spores formed in 4. fruiting bodies
E. intervening dikaryotic stage 5. ascomycetes
6. basidiomycetes
7. deuteromycetes
8. phycomycetes
9. immediately results in diploid cells always
10. dikaryophase of fungus

( A ) A-9 ; B-1 ; C-10 ; D-4 ; E-2
( B ) A-4 ; B-1 ; C-10 ; D-1 ; E-5,7,8
( C ) A-2,3 ; B-1 ; C-10 ; D-4 ; E-5,6
( D ) A-3 ; B-1 ; C-10 ; D-4 ; E-5,6
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(C) is the right answer.

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. Later, the parental nuclei fuse and the cells become diploid. The fungi form fruiting bodies in which reduction division occurs, leading to formation of haploid spores.
answered Apr 2, 2014 by pady_1

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