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Hi, I have a chocolate tan mini daxie whose father and siblings were dapple. Is there any possibility that he sires dapple pups if the dam is black and tan?
 

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No. Dapple is actually merle, and to be dapple/merle, the dog has to have the genotype of either Mm or MM (a double dapple/merle, which can cause serious health issues). A non-dapple/merle dog has a genotype of mm, and as such cannot produce dapple/merle offspring. An Mm dog can produce dapple/merle offspring, as well as non-dapple/merle. An MM dog can only produce dapple/merle offspring.
 
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Merle is dominant, so a m/m x M/M will produce half M/m (non merle, but carrier) and half m/m (merle)

So it depends if your dog is M/m or m/m .. If your dog doesn't show as merle, its likely M/m.. breeding a M/m to a M/m will produce half m/m.. half M/m.. breeding a M/m to a m/m will produce half m/m and half double merle...

For your dogs genetic makeup, look at the "sires" pedigree. Is there merle in the pedigree? if yes, these two dogs might produce merle.. if no, you'll in up with a litter of tan point dogs who have the possibility to be merle carries (M/m)

I think.. i may be wrong
 

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Merle is dominant, so a m/m x M/M will produce half M/m (non merle, but carrier) and half m/m (merle)

So it depends if your dog is M/m or m/m .. If your dog doesn't show as merle, its likely M/m.. breeding a M/m to a M/m will produce half m/m.. half M/m.. breeding a M/m to a m/m will produce half m/m and half double merle...

For your dogs genetic makeup, look at the "sires" pedigree. Is there merle in the pedigree? if yes, these two dogs might produce merle.. if no, you'll in up with a litter of tan point dogs who have the possibility to be merle carries (M/m)

I think.. i may be wrong
You are wrong. :) An Mm dog will be merle. An MM dog will be merle. An mm dog will not be merle.

This is some good info about merle. Dog Coat Colour Genetics

This includes a merle/non-merle punnett square Merle: A Lesson in Inheritance
 

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hah, had things backwards <.<

I was following this guide, but from memory.. my memory did me dirty

- M locus
Merle locus. Order of dominance: Mh > M > Ma > Mc > m. Results are as follows:
Mh/Mh or Mh/M - Double merle herding harlequin
Mh/Ma or Mh/Mc or Mh/m- Herding harlequin
M/M - Double merle
M/Ma - Patchwork
M/Mc - Merle or Tweed
M/m - Merle
Ma/Ma or Ma/Mc or Ma/m - Atypical merle. Atypical merles either have atypical merle pattern, or they look non-merle
Mc/Mc or Mc/m - Cryptic merle. Cryptic merles either have a dilution of the coat present, or they look non-merle
m/m - Non merle
 
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