Question

Dikaryotisation (n+n) in Agaricus is brought about by
A. Clamp connections
B. Somatogamy between two hyphae of different strains
C. Basidiospores
D. Both A and B

Answer 1

Hint: Mushroom is the fruiting body of the fungus, they belong to the phylum Basidomycota, they are spore bearing, and it is a food source. And the Agaricus is a genus of mushrooms.

Complete Answer:
- The life cycle of mushrooms has three stages; spores falling, hyphae developing, and finally mycelium forming. The creation and release of spores are done by the gills located under the mushroom cap.
- The cap pulls in organic matter from the soils to fill the mushrooms. In this part of the mushroom life cycle the caps are used for the absorption of organic matter as nutrients for the growth of mushrooms. These spores are either single cell male or female attached together to form hyphae. Once one spore's hyphae meet another spore's hyphae they meet and combine to be the mechanism of mycelium growth.
- Now, Agaricus is a genus of mushrooms, during maturation the body comprises of vegetative mycelium found in the soil and sporophyte that formed the spore after the growth above the soil. The vegetative part of the mycelium consists of two filamentous hyphae that produce the basidiospores.
- In the beginning, the hyphae are nucleated but later two strains of hyphae are formed and both of them come in contact as a result the nucleus passes from one to the other this process is termed as somatogamy. The cells become dikaryotic after the division by clamp and considered as dikaryotic mycelium.

Thus, the correct answer is ‘D’. Both A and B.

Note: The gills in the cap rapidly divide to form the mushroom. The division in the gills in the cap takes place for the development of mushrooms and the basidia is involved in the bearing of the sexual reproductive part called spores.