Question

Citing examples and making labelled diagrams, explain the isomorphic and heteromorphic alternation of generation.

27 Jan 2024
Answer :
Word Count : 536

Isomorphic and Heteromorphic Alternation of Generations in Plant Diversity

Plant life cycles exhibit a fascinating phenomenon known as alternation of generations, where the life cycle includes both haploid and diploid multicellular stages. This alternation involves the generation of two distinct types of multicellular bodies, namely gametophyte and sporophyte, which differ in ploidy level. The terms isomorphic and heteromorphic are used to describe the relationships between these two generations.

1. Isomorphic Alternation of Generations:

In isomorphic alternation of generations, the gametophyte and sporophyte generations appear morphologically similar or nearly identical. This means that both generations share similar structures and body forms, making it challenging to distinguish between them without considering their reproductive organs. One of the classic examples of isomorphic alternation of generations is found in the mosses.

*Moss Life Cycle:*

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