What is alternation of generation in the life cycle of a plant?
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Plant’s life cycle has two stages.
1) Sporophyte
2) Gametophyte
The diploid sporophytic generation goes under meiosis and produces haploid spores.
These spores after mitosis give rise to ‘Gametophytic generation’ which is haploid as well.
The Gametophytic generation produces male and female haploid gametes.
Then these gametes fuse to form a diploid zygote.
The zygote then gives rise to diploid ‘sporophytic generation.’
In this way, both the generations keep alternating with each other.
This is called Alternation of generation.
Look at the flow chart below, you’ll understand it more better.
1) Sporophyte
2) Gametophyte
The diploid sporophytic generation goes under meiosis and produces haploid spores.
These spores after mitosis give rise to ‘Gametophytic generation’ which is haploid as well.
The Gametophytic generation produces male and female haploid gametes.
Then these gametes fuse to form a diploid zygote.
The zygote then gives rise to diploid ‘sporophytic generation.’
In this way, both the generations keep alternating with each other.
This is called Alternation of generation.
Look at the flow chart below, you’ll understand it more better.
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Explanation:
The life cycle of all plants is complex because it is characterized by alternation of generations. Plants alternate between diploid sporophyte and haploid gametophyte generations, and between sexual and asexual reproduction. ... The zygote grows and develops into a mature sporophyte, and the cycle repeat
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