Comodo dragon virgin birth

comodo dragon virgin birth

The Komodo dragon, turns out, can do both: they can reproduce sexually or asexually depending on their environmental conditions. At most zoos. At Chester Zoo. A British zoo on Wednesday announced the virgin birth of five Komodo dragons, giving scientists new hope for the captive breeding of the. FILEZILLA AN ERROR OCCURRED LOADING THE TRANSFER QUEUE Онлайн Уважаемые форумчане, сообщаю Для вас, что.

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In parthenogenesis, the mother's half-set of chromosomes doubles up to generate the full complement. Hence, the offspring derives all its genes from the mother, but they are not a duplicate of her genome. Komodos have a curious twist in their sex determination as well. Although we think of females being XX that is, having two X chromosomes and males as being XY, it's the other way around in these giant monitor lizards.

Two identical sex chromosomes make a male Komodo, and two different ones make a female. Birds, some insects and a few other lizard species also rely on this sex-determination system. Embryos of some reptiles--notably crocodiles and turtles--don't have any sex chromosomes; rather, the incubation temperature dictates their gender. In Komodo females, each egg contains either a W or a Z. Parthenogenesis hence leads to embryos that are either WW or ZZ. Eggs that consist of WW material are not viable and die off just as YY is not a viable combination ; in contrast, ZZ does work.

So all the Komodo hatchlings have been and will be male ZZ. Evidently, in the case of these Komodos, the doubling of the egg genes occurred when, in essence, another egg, rather than sperm, did the job of fertilization. Oogenesis, the biological process of making an egg cell, typically also yields a polar body--a mini ovum of sorts, containing a duplicate copy of egg DNA. Normally, this polar body shrivels up and disappears. In the case of the Komodos, though, polar bodies evidently acted as sperm and turned ova into embryos.

The ability to reproduce both sexually and parthenogenetically probably resulted from the Komodo dragon's isolated natural habitat, living as it does on islands in the Indonesian archipelago. Researchers have seen other species resort to parthenogenesis when isolated, such as damselflies in the Azores. The ability, researchers speculate, may have enabled the dragons to establish new colonies if females had found themselves washed up alone on neighboring shores, as might happen during a storm.

High school biology texts tend to gloss over parthenogenesis, typically mentioning the process as rare and restricted to mostly small invertebrates. But the phenomenon has emerged from the backwaters in recent years, primarily as a tool for science.

Some scientists hope to exploit the phenomenon to get around ethical concerns surrounding embryonic stem cell research. They can fool an unfertilized human egg to divide by pricking it, thereby simulating the penetration of sperm. Such deceived eggs continue dividing into the blastocyst stage of 50 to cells before petering out naturally. In principle, it may be possible to keep that cell dividing.

In , as a means to elucidate the details of how fertilized eggs develop, scientists in Japan engaged in some genetic trickery to create a fatherless mouse. Such a developmental process probably didn't happen in the little town of Bethlehem two millennia ago--the mistranslation of "young girl or maid" into "virgin" explains the story a lot better.

But as the Komodo dragons' astonishing parthenogenesis feat shows, nature has plenty to teach us about making do without a mate. Philip Yam is the managing editor of ScientificAmerican. All rights reserved. Share Tweet Email. Go Further. Animals Earthworms are hurting insects in much of North America. Animals Wild dolphin observed 'talking' with harbor porpoises. Animals Controversial study says snakes can recognize themselves. Animals Two new species of see-through frog named.

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Comodo dragon virgin birth channel account manager fortinet salary

Female Komodo Dragon Has Virgin Births.

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Earthworms are hurting insects in much of North America. Animals Earthworms are hurting insects in much of North America Often considered a gardener's best friend, earthworms are harming native species in forests where they don't belong. Go Further. Animals Earthworms are hurting insects in much of North America.

Animals Wild dolphin observed 'talking' with harbor porpoises. Animals Controversial study says snakes can recognize themselves. Animals Two new species of see-through frog named. Animals Killing cockroaches with pesticides is only making the species stronger.

Environment Proposed deep-sea mining would kill undiscovered animals. Environment Antarctic ice shelves are shattering. How fast will seas rise? Paid Content Shooting in the Arctic night. Environment War in Ukraine could plunge world into food shortages. Environment Is clear-cutting U.

History Magazine This Egyptian queen's tomb lay untouched for over 4, years. History Magazine This artist became the first female Renaissance superstar. Science How you think about physical pain can make it worse. Science Most distant star ever seen found in Hubble image. Science Coronavirus Coverage If no one else is wearing a mask, should you?

Science Spinosaurus had bones like penguins, sign of underwater hunting. Science Stan the T. Travel Dazzling rock formations stand where dinosaurs once roamed. Paid Content A long night in Arctic exploration. Travel One of the most scenic railways is in Iran. Subscriber Exclusive Content. Why are people so dang obsessed with Mars? How viruses shape our world. The era of greyhound racing in the U. See how people have imagined life on Mars through history.

See More. It's not so much a refutation of the scientific method as it is simply a new discovery. The term "virgin birth" is appropriate to use in both cases since the process of a female giving birth without male fertilization is called "parthenogenesis" which, as stated in the article, is Greek for "virgin birth". This post is not about science, and it's not about religion. Rather, it's about the careful and proper use of language -- something the folks at SMM know I will drone on about at length!

The curator of the Chester Zoo misuses the term "immaculate conception. Rather, it refers to Mary being conceived by Sts. Joachim and Anne in the usual fashion, but without the stain of original sin. So common is this mistake that Wikipedia refers to it as "the immaculate misconception.

Flora's eggs have hatched! She's now mom and dad to five bouncing baby dragons , with two more in the incubator and expected to hatch anytime Hey, remember those discredited Korean stem cell researchers who claimed to have created the first cloned human embryo? Turns out that they did make a major breakthrough--it just wasn't the one they published. Instead, they found a way to "trick" a human egg, without sperm, into developing into an embryo.

And the resulting embryo was used to generate a stem cell line. Human parthenogenesis! Connect with Science Buzz on Facebook and Twitter. You can also subscribe to our RSS feed using any newsreader software. Science Buzz is supported by the National Science Foundation. Science Buzz. Be a part of the Buzz! Register or log in. Komodo dragons deliver virgin births by Anonymous 16 comments.

The lizards can grow up to nine or ten feet in length, and are known to bite their prey with choppers full of lethal, bacteria-ridden saliva that slowly kills them Sungai has since died, but another Komodo dragon, named Flora, at the Chester Zoo in England has laid eggs that are expected to hatch next month.

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KOMODO DRAGON EATING ALIVE PREGNANT DEER AND BABY INSIDE (GRAPHICS CONTENT) comodo dragon virgin birth

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