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Mule's foal fools genetics[Mule Giving Birth]
The Denver Post ^ | 08 Aug 2007 | NANCY LOFHOLM

Posted on 08/09/2007 8:41:21 AM PDT by BGHater

When it reportedly happened in Morocco five years ago, locals feared it signaled the end of the world. In Albania in 1994, it was thought to have unleashed the spawn of the devil on a small village.

But on a Grand Mesa ranch, the once-in-a-million, genetically "impossible" occurrence of a mule giving birth has only drawn keen interest from the scientific world. That, and a stream of the locally curious driving up from the small town of Collbran to check out and snap pictures of a frisky, huge-eared, gangly legged foal.

"No one has run away in fear yet," laughed Laura Amos, the owner of the foal, along with her husband, Larry.

The foal is being called a miracle because mules aren't supposed to give birth. Mules are a hybrid of two species -- a female horse and a male donkey -- so they end up with an odd number of chromosomes. A horse has 64 chromosomes and a donkey has 62. A mule inherits 63. An even number of chromosomes is needed to divide into pairs and reproduce.

But those numbers added up to implausibility in late April when the Amoses awoke to a braying and whinnying ruckus in the corral behind their house.

They spotted a foal peeking out from between the front legs of one of their favorite black mules, Kate. They tore outside to save the baby from the male mules -- the johns -- that were trying to stomp the little critter and the other female mules -- the mollies -- that were trying to steal it.

And then the Amoses began to ponder how the foal had fooled mule sterility, a phenomenon first noted by the Greek philosopher Aristotle.

The Amoses, who have about 100 horses and mules at their Winterhawk Outfitters business, knew that what they were seeing is considered virtually scientifically impossible -- as much so today as in ancient Greece. They began doing research and found that in the past two centuries about 50 cases of mules giving birth have been recorded. Only two of those were proved with genetic testing.

It's an event so rare that the Romans had a saying, "cum mula peperit," meaning "when a mule foals" -- the equivalent of "when hell freezes over."

Genetic testing at the University of Kentucky and the University of California at Davis confirmed that Kate is indeed a mule and that the still unnamed foal really is her offspring. That ruled out factors that have explained away some of the past births mistakenly attributed to mules. Those mules had stolen foals or they were not really mules themselves. They were donkeys or mulish-looking horses.

Now, the Amoses are waiting for chromosome testing from the University of California to determine exactly what is the fast-growing foal cavorting clumsily around their corral. He could be a smidgen of horse and a lot of donkey or mostly horse with just a bit of donkey genes.

"He's got a donkey look now, but they all do at that age," Larry Amos said.

Dr. Oliver Ryder, associate director of the Conservation and Research of Endangered Species division at the San Diego Zoo, said the answer to how Kate could give birth could be surprising. There were very unexpected -- and still unexplained -- findings when a molly mule gave birth to two foals in Nebraska in the mid-1980s. The event prompted notice from the local pulpit and a flurry of scientific investigation, including the first genetic testing of a mule's offspring.

Ryder said that tests in the Nebraska case showed there was no evidence the mother passed along any genetic markers from her father -- a donkey that was also the father of the foals. The phenomenon is called "hemiclonal transmission," which in simple terms means that the mare's genes canceled out the male's genes as if they didn't even exist.

That phenomenon has been observed in amphibians but not in mammals.

"No recombinations took place. There was no reassortment. We looked at markers on every chromosome," Ryder said. "This was an extremely unexpected finding."

Another famous but scientifically undocumented case occurred at Texas A&M in the 1920s. A mule gave birth to a mule when the sire was a donkey and then to a horse when the sire was a stallion.

Ryder said he is "fascinated by this phenomenon" and is looking forward to learning more from the Amoses' foal.

So is the mule publication "Mules and More," which is running a contest to name the foal and has promised readers regular updates.

The Amoses are still scratching their heads. They didn't know Kate was pregnant when they bought her and nine other mules from a breeder in Pleasant Plains, Ark., late last summer. She worked as a pack animal through the winter, and no one noticed when the animals were brought in this spring that she was pregnant. They were all fattened from a winter of good feed.

The Amoses are talking about breeding Kate again. They want to see if the "miracle" will occur twice. They say they have no fear that it will bring on the end of the world.

TOPICS: Miscellaneous; US: Colorado
KEYWORDS: foal; genetic; mule
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1 posted on 08/09/2007 8:41:24 AM PDT by BGHater
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To: BGHater


2 posted on 08/09/2007 8:42:17 AM PDT by JamesP81 (Keep your friends close; keep your enemies at optimal engagement range)
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To: BGHater

Forty years of darkness. Earthquakes, volcanoes...

The dead rising from the grave.

Human sacrifice, dogs and cats living together - mass hysteria.

3 posted on 08/09/2007 8:46:18 AM PDT by ElkGroveDan (When toilet paper is a luxury, you have achieved communism.)
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To: BGHater

The opportuntities for puns in this article are simply too many to contemplate.

4 posted on 08/09/2007 8:46:23 AM PDT by Attention Surplus Disorder (When Bubba lies, the finger flies!)
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To: BGHater

Just a sexy mule.

5 posted on 08/09/2007 8:46:59 AM PDT by golfisnr1 (Democrats are like roaches - hard to get rid of.)
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To: BGHater
The Amoses are still scratching their heads. They didn't know Kate was pregnant

How many Amoses does it take to screw in a light bulb?

6 posted on 08/09/2007 8:47:33 AM PDT by mtbopfuyn (I think the border is kind of an artificial barrier - San Antonio councilwoman Patti Radle)
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To: BGHater

Must be a really slow news day. Nothing new there. Hybrids between species are frequently fertile to a certain degree.

7 posted on 08/09/2007 8:54:09 AM PDT by RouxStir (No Peeing Allowed in the Gene Pool.)
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To: mtbopfuyn

A grass belly on a mule looks the same as a pregnancy. Of course you wouldn’t have understood that from actually reading the article.


8 posted on 08/09/2007 8:54:31 AM PDT by cinives (On some planets what I do is considered normal.)
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To: BGHater

Nature adjusts, and new species evolve?

9 posted on 08/09/2007 9:01:39 AM PDT by Bringbackthedraft
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To: golfisnr1

But the dad is a real ass!

10 posted on 08/09/2007 9:06:42 AM PDT by MDspinboyredux
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To: ElkGroveDan

Pretty amazing that a molly out of Arkansas would accept either a john or a stallion, being as how the typical Arkansas molly is stump trained by the time she’s a yearling.

11 posted on 08/09/2007 9:07:31 AM PDT by Bedford Forrest (Roger, Contact, Judy, Out. Fox One. Splash one.<I>)
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To: BGHater

I found a story with some photos.

12 posted on 08/09/2007 9:12:49 AM PDT by dawn53
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To: Bedford Forrest

I heered they’s turnin more to poultry these days.

13 posted on 08/09/2007 9:17:40 AM PDT by skeptoid (AA, UE, MBS (with clusters))
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To: Slings and Arrows

Not a kitty ping

14 posted on 08/09/2007 9:22:33 AM PDT by beaversmom
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To: BGHater

I don’t think there are any impossibilities with such genetics, just very low probabilities.

15 posted on 08/09/2007 9:23:08 AM PDT by antiRepublicrat
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To: dawn53

That’s a lot of leg on that little dude!

16 posted on 08/09/2007 9:30:21 AM PDT by Grammy (No matter the question, chocolate is the answer.)
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To: Grammy

He’s a little cutie!

17 posted on 08/09/2007 9:34:04 AM PDT by Fire_on_High (I am so proud of what we were...)
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To: BGHater

The mother is from Arkansas, you say? Have either of the Clintons been back in the ole stompin grounds lately?

18 posted on 08/09/2007 9:35:23 AM PDT by stefanbatory
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To: ElkGroveDan
Forty years of darkness

Isn't that called a Democrat controlled Congress?

19 posted on 08/09/2007 9:41:07 AM PDT by A_Tradition_Continues (THE NEXT GENERATION CONSERVATIVE)
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To: HairOfTheDog
I like mules...


20 posted on 08/09/2007 9:41:19 AM PDT by 2Jedismom (17 more days.)
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