Mutants!!! (real science content)

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Have you ever wondered how a new species gets started?

Have you wondered if mutants could really exist?

Have you read stories about societies consisting of mutant women who reproduced without men?

Well, here is an excerpt of this article (This Mutant Crayfish Clones Itself, and It’s Taking Over Europe) about the marbled crayfish.

'It apparently evolved from a species known as the slough crayfish, Procambarus fallax, which lives only in the tributaries of the Satilla River in Florida and Georgia.

The scientists concluded that the new species got its start when two slough crayfish mated. One of them had a mutation in a sex cell — whether it was an egg or sperm, the scientists can’t tell.

Normal sex cells contain a single copy of each chromosome. But the mutant crayfish sex cell had two.

Somehow the two sex cells fused and produced a female crayfish embryo with three copies of each chromosome instead of the normal two. Somehow, too, the new crayfish didn’t suffer any deformities as a result of all that extra DNA.

It grew and thrived. But instead of reproducing sexually, the first marbled crayfish was able to induce her own eggs to start dividing into embryos. The offspring, all females, inherited identical copies of her three sets of chromosomes. They were clones.

Now that their chromosomes were mismatched with those of slough crayfish, they could no longer produce viable offspring. Male slough crayfish will readily mate with the marbled crayfish, but they never father any of the offspring.

In December, Dr. Lyko and his colleagues officially declared the marbled crayfish to be a species of its own, which they named Procambarus virginalis. The scientists can’t say for sure where the species began. There are no wild populations of marble crayfish in the United States, so it’s conceivable that the new species arose in a German aquarium.'

Wow, just wow.