If the question refers to eggs in general, the egg came first. The first amniote egg—that is, a hard-shelled egg that could be laid on land, rather than remaining in water like the eggs of fish or amphibians—appeared around 312 million years ago.
Egg laying almost certainly came before live birth; the armored fish that inhabited the oceans half a billion years ago and were ancestral to all land vertebrates seem to have laid eggs.
Eggs are much older than chickens. Dinosaurs laid eggs, the fish that first crawled out of the sea laid eggs, and the weird articulated monsters that swam in the warm shallow seas of the Cambrian Period 500 million years ago also laid eggs. They weren't chicken's eggs, but they were still eggs.
Back to our original question: with amniotic eggs showing up roughly 340 million or so years ago, and the first chickens evolving at around 58 thousand years ago at the earliest, it's a safe bet to say the egg came first. Eggs were around way before chickens even existed.
But in theory, at some point two junglefowl bred and their offspring was genetically different enough from the species of its parents to be classified as a chicken. This chicken would have developed within a junglefowl egg and only produced the very first chicken's egg on reaching maturity.
The earliest life forms we know of were microscopic organisms (microbes) that left signals of their presence in rocks about 3.7 billion years old.
So proto-hen laid an egg, and proto-rooster fertilized it. But when the genes from ma and pa almost-chicken fused, they combined in a new way, creating a mutation that accidentally made the baby different from its parents.
Armed with knowledge of evolution, the answer is straightforward. Eggs came first. Next time you crack open an egg, think of its many unusual features, and the hundreds of millions of years of evolution that preceded its appearance. Dinosaurs, the animal group that includes birds and their ancestors, laid eggs.
After all, understanding the question based strictly on Genesis, the chicken would come first.
Scientists have now claimed to have cracked the riddle of whether the chicken or the egg came first. The answer, they say, is the chicken. Researchers found that the formation of egg shells relies on a protein found only in a chicken's ovaries. Therefore, an egg can exist only if it has been inside a chicken.
An egg is an organic vessel grown by an animal to carry a possibly fertilized egg cell (a zygote) and to incubate from it an embryo within the egg until the embryo has become an animal fetus that can survive on its own, at which point the animal hatches.
The Aussie Egg is a limited legendary egg in Adopt Me! that was released on February 29, 2020, and replaced the Farm Egg.
It is possible for a female chicken to take on external characteristics of a male, a phenomenon referred to as sex reversal. (To date, spontaneous sex reversal from male to female has not been reported.)
Scientists have unraveled the origins of human pregnancy by tracing how our early mammal ancestors first evolved to give birth to live young. They found rogue fragments of DNA that jumped around the genome millions of years ago caused switched off the processes needed to lay eggs.
Copperheads are ovoviviparous, meaning they give birth to their young encased in an amniotic sac, rather than laying eggs like many other snakes. After giving birth, a copperhead mother does not care for her young.
No bird gives birth to live young. Birds quickly form and lay an egg covered in a protective shell that is then incubated outside the body. Birds developed much great mobility than a mammal, but at the cost of being unable to carry its growing offspring about in its body.
The classification of today's chicken (Gallus gallus domesticus) recognizes its primary origin, the Red Junglefowl. Domestication probably occurred 7,000-10,000 years ago in Southeast Asia and Oceana.
Evolutionary scientists believe that fish appeared on the Earth roughly 500 million years ago. Birds appeared around 150 million years ago. This means that eggs have existed on the Earth for at least 350 million years longer than anything resembling a chicken, and, consequently, that the egg came before the chicken.
Christianity adopted eggs as a symbol of fertility, resurrection, and eternal life. From the outside, eggs appear stone cold, yet inside they nurture young life. Just as a grave keeps life locked in, eggs stood for the tomb in Jerusalem, from which Christ rose from death 'like a bird hatching from an egg'.
Dinosaurs must have had sex to reproduce. As in nearly all modern-day reptiles, males would have deposited sperm inside females, which would later lay fertilized eggs containing developing dinosaur embryos.
No T. rex eggs or nests have ever been found, but fossils of other Tyrannosaur relatives suggest that they laid elongated eggs, roughly 20 or more at a time.
The egg came first. It was a genetic mutation in the egg of a predecessor to the duck. One can expect that there was a series of genetic mutations that finally resulted in the duck as a unique species. Genetic mutations that get passed along to the offspring always occur in the egg.
Yes. It is a rare occurrence. When two chicks hatch from the same egg, the egg usually has two yolks. Usually, one embryo out competes the other and only one chick survives to hatch.
A double yolk occurs in an egg when a chicken releases two yolks into the same shell. Double yolks are usually produced by young chickens. Since their reproductive systems have not fully matured, they periodically release two yolks instead of one.
About 3,000 elegant tern eggs were abandoned at a southern California nesting island after a drone crashed and scared off the birds, a newspaper reported Friday.