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Old 11-17-2010, 10:28 AM   #1
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Default Giant Sperm (Not a Whale)

As a companion piece to the ballsy crickets, some male insects have sperm cells all out of proportion to their bodies - for example, some flies in the genus Drosophila (the familiar but misnamed 'fruit flies' of genetic studies) have sperm cells up to 10 times the body length of the fly itself! - see Another way of being anisogamous in Drosophila subgenus species: giant sperm, one-to-one gamete ratio, and high zygote provisioning.
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Old 11-17-2010, 04:31 PM   #2
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Interesting. I've never heard of that.

I found this most interesting: "...they (sperm) are offered in exceedingly small amounts, tending to a one-to-one gamete ratio after a single mating."
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Old 11-18-2010, 10:39 PM   #3
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Suunto, I have to ask. How does a fly with a sperm ten times the length of his body manage to get it into the female?????? That would seem to be physically impossible, but given the sheer number of Drosophila in the world, clearly they manage.
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Old 11-19-2010, 06:44 AM   #4
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Originally Posted by turttle View Post
Suunto, I have to ask. How does a fly with a sperm ten times the length of his body manage to get it into the female?????? That would seem to be physically impossible, but given the sheer number of Drosophila in the world, clearly they manage.
First off, giant sperm do not occur in all Drosophila species. Then, such sperm, although extremely long, also are extremely slender, and thus may be coiled up in a very small packet which is passed along in the usual manner during copulation. Taking a somewhat analogous example, if one were to uncoil the DNA in a single human cell, it would stretch some two to three meters! (see Length of a Human DNA Molecule)
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Old 11-20-2010, 06:50 PM   #5
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"As a companion piece to the ballsy crickets" ha ha ha ha ha!!! Where's the ballsy cricket article?
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Old 11-21-2010, 07:13 AM   #6
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"As a companion piece to the ballsy crickets" ha ha ha ha ha!!! Where's the ballsy cricket article?


It is in this forum, posted on 16 November by Staff - "Cricket Sets Testicle Size Record"
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dna, drosophila, fertilize, flies, fly, flying insects, fruit flies, fruit fly, gamete, genetic, giant, insect, insects, mate, mating, reproduce, reproduction, sperm, sperm cells, whale, zygote

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