ORIGIN: New Scientist
Virgin Birth or just a really efficient long-term family planning?
Wikimedia Commons |
Perplexed scientists then took DNA samples of the snake and her triplet to figure out how this happened.
The scientists expected to see an example of a "virgin birth" (parthenogenesis), in which a female produces young without any contribution from a male. But in this case the snakelets carried genes that their mother didn't, so it became clear that she must have mated before she was captured and stored the sperm since more than 5 years.
The female diamond-backed rattlesnake can store sperm for five years (Image: Chris Johns/NGS) |
In another instance, a hammerhead female shark was seen giving birth to a shark pup completely via asexual reproduction. Further, this discovery of virgin births in sharks leaves mammals as the only vertebrates not known to be able to reproduce asexually outside of the lab.
Shark virgin birth info: http://www.newscientist.com/article/dn11908-shark-pup-result-of-virgin-birth.html
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