The Spotting Gene - Any Known Glitches?

[betty]

I have been breeding Spotteds for some time now, but I have just had a small litter of 4 pups - none of who are spotted - from a Spotted Nutmeg X Burmese Litter. They are all totally solid coated - not even a hint of a forehead spot.

I didn't check the litter for a week after birth, so I know that she could have lost a pup or two along the way and they could have been the spotted ones, but are there any genetic instances where spotting hasn't been passed on?

I am sure her second litter will throw at least one spot (otherwise I will certainly be more interested) but just wondered if there were any known glitches in the gene?

Thanks.

[Shooting Star]

Just roll of the dice. When you see figures that say a spot x solid pair gives 50% spotted, that doesn't mean that 50% of the litter will be spotted. It means that each individual pup has a 50% chance of being spotted. So in a smallish litter, you don't always see a spotted pup. Likewise, you might have a litter where every pup is spotted. (Using "spotted" here to mean "having white spots", not a particular pattern.)

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[betty]

Hmm.

Genes are great aren't they - but their glitches can be even more interesting...

[betty]

She had her second litter by the way - all 3 were spotted.

Typical.