Parthenogenesis and Gametophytes

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In summary: Thanks!In summary, Schrodinger's book is very interesting and he says that male drone bees can be considered to be oversized sperm. He also says that flowering plants are dominated by a sporophyte phase - even though their small reproductive structures are gametophytes.
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Simfish
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So I'm reading Schrodinger's "What is Life", which is very interesting. He says that male drone bees can be considered to be oversized sperm, a phrase that greatly intrigued me. Genetically, there is no distinction between the genes of a sperm cell and those of a male drone bee (although the drone bee has lots of sperm cells, each of which have different genetic material? - is this necessarily the case?)

Now, are these male drone bees gametophytes? (just like mosses?)

And what of other animals that reproduce through parthenogenesis? They are probably diploid animals though - so they still can be considered sporophytes. Is this correct?

Thanks!
 
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Simfishy said:
He says that male drone bees can be considered to be oversized sperm, a phrase that greatly intrigued me.
Thanks!
Ok, so why then can not a queen be considered an egg?
 
  • #3
The terms sporophyte and gametophyte are reserved for fungi and plants and do not apply to animals.
 
  • #4
The terms sporophyte and gametophyte are reserved for fungi and plants and do not apply to animals.

But aren't they technically the same for animals? The only difference between sporophytes and gametophytes is that whereas gametophyte cells are haploids, sporophyte cells are diploid. Technically, flowering plants are dominated by a sporophyte phase - even though their small reproductive structures are gametophytes. The same applies for animals. Analogously, then, most animals are similar to angiosperms.

"In the alteration of generations, a gametophyte is the structure, or phase of life, that contains only half of the total complement of chromosomes:"

On the other hand, though, gametes are not gametophytes. It seems that the sporophyte/gametophyte distinction applies only on the level of the organism, not the level of the cell. It is unnecessary to apply this distinction to animals anyways - since haploid and diploid are sufficiently adequate enough to explain the distinction between, say, drone male bees and non-drone male bees.

==

Ok, so why then can not a queen be considered an egg?
Also, the logic would not apply to queen bees - male bees actually come out of unfertilized eggs and consequently have different Hamiltonian coefficients than the Hamiltonian coefficients of queen bees.
 

1. What is parthenogenesis?

Parthenogenesis is a form of asexual reproduction in which an unfertilized egg develops into a new individual without any genetic contribution from a male. This process is commonly observed in some species of plants, invertebrates, and even some reptiles and fish.

2. How is parthenogenesis different from sexual reproduction?

In sexual reproduction, two gametes (sperm and egg) from different individuals combine to form a new individual with a unique genetic makeup. In parthenogenesis, only one parent is involved in producing offspring, and the offspring are essentially clones of the parent organism.

3. What is a gametophyte?

A gametophyte is a haploid (containing one set of chromosomes) plant or organism that produces gametes (reproductive cells) through mitotic cell division. In plants, the gametophyte is the stage in the life cycle that produces the eggs and sperm cells.

4. How do gametophytes contribute to parthenogenesis?

In some species, the gametophyte stage is able to reproduce asexually through parthenogenesis, producing offspring without the need for fertilization. This is particularly common in plants, where the female gametophyte can give rise to a new plant without fertilization from a male gamete.

5. What are the advantages and disadvantages of parthenogenesis and gametophytes?

The main advantage of parthenogenesis and gametophytes is that it allows for reproduction without the need for a mate, which can be beneficial in isolated or low population areas. However, this also means that there is less genetic diversity, which can make a species more susceptible to diseases and environmental changes. Additionally, parthenogenesis and gametophytes may limit the ability of a species to adapt and evolve over time.

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