QUESTION - Alternation of generations (1 Viewer)

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So when a plant is alternating does that mean it goes from all cells in its body being diploid to all of them becoming haploid, or is it only a certain part which changes. And the alternate generations are for the same plant right, the generations are throwing me off. EXPLAIN RIGHT NOWWWW
 

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So when a plant is alternating does that mean it goes from all cells in its body being diploid to all of them becoming haploid, or is it only a certain part which changes. And the alternate generations are for the same plant right, the generations are throwing me off. EXPLAIN RIGHT NOWWWW
No only certain cells go through the transition. think about it logically if all the diploid cells became sex cells then the organism wouldn't be able to survive. An the "alternate generations" is for the life cycle of a plant, so yes it is the same plant.

Heres an example
Alternation of Generations โ€“ Life Cycle
Alternation of Generations

Alternation of Generations
The alternation of generations include the following stages:

  • The diploid sporophyte has a structure called sporangium.
  • The sporangium undergoes meiosis and forms haploid spores.
  • The spore develops into a gametophyte which is haploid in nature.
  • The gametophyte has the reproductive organs which undergo mitosis to form haploid gametes.
  • The gametes fertilize to form a haploid zygote which matures into a mature sporophyte. This cycle keeps repeating.
Stages of Alternation of Generations
Following are the two stages of alternation of generations:

Sporophyte Generation
Two haploid gametes fuse together to form a diploid zygote. This results in a sporophyte.

The sporophyte is formed by multiple rounds of mitosis and is a multicellular organism. On reaching maturity, the sporophyte develops reproductive organs known as sporangia. This is one key point in the alternation of generations.

These sporangia are used to create haploid spores. These spores are released and carried away by air and water and when the conditions are favourable they develop into a gametophyte.



Gametophyte Generation
This is the next generation in the alternation of generations. The spore is newly formed and has half the DNA as the parent organism. This spore undergoes mitosis multiple times to form a gametophyte.

This generation creates gametes. These gametes are produced by gametangia. These gametes are then transferred between plants or spread into the environment.

When a gamete encounters a gamete of the opposite sex, it fuses with it to form a zygote which eventually becomes a sporophyte.

This is the simplest version of alternation of generations. This is widely found in ferns.
 
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Hey did u mean diploid zygote at the end.





The alternation of generations include the following stages:

  • The diploid sporophyte has a structure called sporangium.
  • The sporangium undergoes meiosis and forms haploid spores.
  • The spore develops into a gametophyte which is haploid in nature.
  • The gametophyte has the reproductive organs which undergo mitosis to form haploid gametes.
  • The gametes fertilize to form a haploid diploid zygote which matures into a mature sporophyte. This cycle keeps repeating.
 

Hivaclibtibcharkwa

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Hey did u mean diploid zygote at the end.





The alternation of generations include the following stages:

  • The diploid sporophyte has a structure called sporangium.
  • The sporangium undergoes meiosis and forms haploid spores.
  • The spore develops into a gametophyte which is haploid in nature.
  • The gametophyte has the reproductive organs which undergo mitosis to form haploid gametes.
  • The gametes fertilize to form a haploid diploid zygote which matures into a mature sporophyte. This cycle keeps repeating.
Yes my bad
 

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