Title: Bryophytes : Alternation of Generations
Headings: Bryophytes : Alternation of Generations
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Chapter: 11th 12th standard bio zoology Human Body higher secondary school
Bryophytes : Alternation of Generations
Bryophytes : Alternation of Generations

Content: It is called sporophyte because it undergoes asexual reproduction to produce spores. Production of spores involves meiosis, so that there is a return to the haploid condition. The haploid spores give rise to the gametophyte generation. One of the two generations is always more conspicuous and occupies a greater proportion of the life cycle. This generation is called as the dominant generation. In all Bryophytes the gametophyte generation is dominant. In all other land plants the sporophyte generation is dominant. It is customary to place the dominant generation in the top half of the life cycle diagram. The figure given above summarises the life cycle of a typical Bryophyte. One point that must be remembered here is that gamete production involves mitosis and not meiosis as in animals.