"Baby Jesus" Liazrds

Virgin birth baby lizards? Two Komodo dragons in England have laid self-fertilized eggs.

That's because the virgin in question is Flora the Komodo dragon, a giant lizard at Chester Zoo in England that has laid fertile eggs despite never having had a mate.

DNA tests confirmed Flora was the sole parent, says Chester Zoo curator of lower vertebrates Kevin Buley.

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Flora, along with another female Komodo dragon from the London Zoo, represent the first known cases of virgin birth in the world's largest lizard, according to researchers.

The two reptiles are examples of a process called parthenogenesis, in which offspring are produced without fertilization by a male, according to a report in the current issue of the journal Nature.

Others have said that this may help explain how monitors populate islands. It is now believed that it only takes a lone female to reach and island and not a pair of monitors like previously thought. And due to lizard genetics all offspring will be males! I find this very bizzare considering monitor sex is thought to be temperature dependant.

A Komodo dragon at London Zoo gave birth earlier this year after being separated from males for more than two years.

Scientists thought she had been able to store sperm from her earlier encounter with a male, but after hearing about Flora's eggs researchers conducted tests which showed her eggs were also produced without male help.

"You have two institutions within a few short months of each other having a previously unheard of event. It is really quite unprecedented," said Buley.

The scientists, reporting the discovery in the science journal Nature, said it could help them understand how reptiles colonize new areas.

A female dragon could, for instance, swim to another island and establish a new colony on her own.

"The genetics of self-fertilization in lizards means that all her hatchlings would have to be male. These would grow up to mate with their own mother and therefore, within one generation, there would potentially be a population able to reproduce normally on the new island," Buley said.

If anyone can shed some light on why parthenogenesis always results in all male clutches please do share as I do not understand why this is neccessarily true. If parthenogenesis were to happen in humans, the offspring would have to be female. I know that varanids lack a X-chromosome like most mammals, but why all males? It makes sense from an evolutionary standpoint, but the cell biology is confusing.

Here's hoping at least one of them gets named Jesus.