Explain the alteration of generation in pteridophytes class 11
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In plants, there are two systems of reproduction. Each is called one generation. There is a rotation between these generations. So, one complete life cycle of a plant includes two generations that alternate with each other. Hence the whole mechanism is called alternation of generations.
The two generations or life cycles that occur are called the sporophyte generation and the gametophyte generation. When you speak in genetic terms, it is the rotation in between the haploid and diploid stages. This refers to the chromosomes within the plant cells.
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Alternation of generations, also called metagenesis or heterogenesis, in biology, thealternation of a sexual phase and an asexual phase in the life cycle of an organism. The two phases, or generations, are often morphologically, and sometimes chromosomally, distinct.
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