SHARP BELLE (roan) never produced a gray/ro product -OTHERS?

Jorge · Postby **Jorge** » Tue Mar 23, 2010 5:00 am

Apparently, the wrongly so called "roan" mare (actually a gray) Sharp Belle (1975) never produced a "gray" product from around 10 foals she had with different sires.

http://www.pedigreequery.com/progeny/sharp+belle

Now my question: how many cases with 10 or more products like in this case have you seen.

summerhorse · Postby **summerhorse** » Tue Mar 23, 2010 8:50 am

Very odd but since every foal has the same chance of grey it is possible. It's also possible some of those foals were registered as a solid color and later greyed out and the reg. was never changed.

accphotography · Postby **accphotography** » Tue Mar 23, 2010 12:08 pm

I found two places she's listed as dark chestnut, but no photos. I wonder if maybe she just had some sabino roaning or something... or if they assumed she was gray because she was born abnormally dark for a chestnut (but was really just a liver).

Jorge · Postby **Jorge** » Fri Mar 26, 2010 3:27 pm

Any other case (or cases)? :idea:

ElPrado · Postby **ElPrado** » Tue Mar 30, 2010 7:31 pm

She had one gr gene. She had a 25% chance to produce a gray foal. The cards fell that she didn't. I don't see anything unusual about it.

RiddleMeThis · Postby **RiddleMeThis** » Tue Mar 30, 2010 7:53 pm

ElPrado wrote:She had one gr gene. She had a 25% chance to produce a gray foal. The cards fell that she didn't. I don't see anything unusual about it.

50% not 25%

accphotography · Postby **accphotography** » Tue Mar 30, 2010 7:58 pm

What's unusual about it is that it happened 10 times.

ElPrado · Postby **ElPrado** » Wed Mar 31, 2010 7:58 pm

Not really.
Each offspring had a 25% chance to have the gray gene. Each was a separate case. You can't add them together. I had it drilled into my head in college biology.

RiddleMeThis · Postby **RiddleMeThis** » Wed Mar 31, 2010 8:02 pm

ElPrado wrote:Not really.
Each offspring had a 25% chance to have the gray gene. Each was a separate case. You can't add them together. I had it drilled into my head in college biology.

No. Each offspring had a 50% chance of getting the gray gene. She had one copy of gray, and one copy of non gray. She passes each of those 50% of the time. Each offspring had 50% chance of being gray, not 25%.

ElPrado · Postby **ElPrado** » Thu Apr 01, 2010 8:10 pm

Ok. I guess I must be wrong.
She had 1 gray gene. She had one non gray gene.
The sires had 2 non gray genes.
It still seems like it was 1 to 3 to me.
I didn't take into account that the genes are at different loci on the cromosones. My bad.

Jorge · Postby **Jorge** » Fri Apr 02, 2010 7:31 am

It's like throwing a dice ten times and expecting either a "1" a "3" or a "5" (odd numbers) and getting either a "2", a "4", or a "6" (pair numbers). In other words, this is not an impossible happening but certainly a head scratching slim possible occurrence, rather than a normal probable event.

accphotography · Postby **accphotography** » Fri Apr 02, 2010 9:45 am

I do think it's perfectly logical to think maybe she wasn't even gray at all. After seeing two places list her as dark chestnut especially. Too bad I couldn't find a photo.

Sunday Rider · Postby **Sunday Rider** » Fri Apr 02, 2010 6:31 pm

we have a gray madian mare her sire and dame were gray she is a" Flee bitten" she has very small chestnut "freckels...specks?" The sire of her foal is a chestnut with 4 white socks and a full blaze. What are the chances of us have a gray? I sooooo want a gray!

spacely · Postby **spacely** » Fri Apr 02, 2010 6:44 pm

What are the chances of us have a gray?

50%

accphotography · Postby **accphotography** » Fri Apr 02, 2010 7:03 pm

It's probably closer to about 75%+ since we don't know if she's homozygous or not.