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“Tracy”
PTK Trace The Stars

Shih Tzu

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Registration

American Kennel Club (AKC): TS44581006

Genetic Breed Result

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Shih Tzu

This ancient breed is the perfect lapdog. Sweet and easygoing, they want nothing more than to be close to their humans.

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Health Summary

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Tracy inherited one variant that you should learn more about.

Prekallikrein Deficiency

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Tracy inherited one copy of the variant we tested

What does this result mean?

This variant should not impact Tracy’s health. This variant is inherited in an autosomal recessive manner, meaning that a dog needs two copies of the variant to show signs of this condition. Tracy is unlikely to develop this condition due to this variant because she only has one copy of the variant.

Impact on Breeding

Your dog carries this variant and will pass it on to ~50% of her offspring. You can email breeders@embarkvet.com to discuss with a genetic counselor how the genotype results should be applied to a breeding program.

What is Prekallikrein Deficiency?

Prekallikrein is an enzyme necessary for the activation of certain clotting proteins. Fortunately, this is a benign blood disorder and is not associated with increased bleeding tendencies.

Breed-Relevant Genetic Conditions

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Intervertebral Disc Disease (Type I) (FGF4 retrogene - CFA12)

Identified in Shih Tzus

Additional Genetic Conditions

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Traits

Explore the genetics behind your dog’s appearance and size.

Coat Color

Coat Color

Other Coat Traits

Other Coat Traits

Other Body Features

Other Body Features

Body Size

Body Size

Performance

Performance

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Through Tracy’s mitochondrial DNA we can trace her mother’s ancestry back to where dogs and people first became friends. This map helps you visualize the routes that her ancestors took to your home. Their story is described below the map.

Haplogroup

B1

Haplotype

B81

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B1

PTK Trace The Stars’s Haplogroup

B1 is the second most common maternal lineage in breeds of European or American origin. It is the female line of the majority of Golden Retrievers, Basset Hounds, and Shih Tzus, and about half of Beagles, Pekingese and Toy Poodles. This lineage is also somewhat common among village dogs that carry distinct ancestry from these breeds. We know this is a result of B1 dogs being common amongst the European dogs that their conquering owners brought around the world, because nowhere on earth is it a very common lineage in village dogs. It even enables us to trace the path of (human) colonization: Because most Bichons are B1 and Bichons are popular in Spanish culture, B1 is now fairly common among village dogs in Latin America.

B81

PTK Trace The Stars’s Haplotype

Part of the large B1 haplogroup, this haplotype occurs most frequently in Shih Tzus, Chihuahuas, and Poodles.

The B1 haplogroup can be found in village dogs like the Peruvian Village Dog, pictured above.

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The Paternal Haplotype reveals a dog’s deep ancestral lineage, stretching back thousands of years to the original domestication of dogs.

Are you looking for information on the breeds that Tracy inherited from her mom and dad? Check out her breed breakdown.

Paternal Haplotype is determined by looking at a dog’s Y-chromosome—but not all dogs have Y-chromosomes!

Why can’t we show Paternal Haplotype results for female dogs?

All dogs have two sex chromosomes. Female dogs have two X-chromosomes (XX) and male dogs have one X-chromosome and one Y-chromosome (XY). When having offspring, female (XX) dogs always pass an X-chromosome to their puppy. Male (XY) dogs can pass either an X or a Y-chromosome—if the puppy receives an X-chromosome from its father then it will be a female (XX) puppy and if it receives a Y-chromosome then it will be a male (XY) puppy. As you can see, Y-chromosomes are passed down from a male dog only to its male offspring.

Since Tracy is a female (XX) dog, she has no Y-chromosome for us to analyze and determine a paternal haplotype.

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