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Fritz

French Bulldog

“Fritz came from a pet store. He was born in Bakersfield, California in November 2016. He was sold as a purebred French Bulldog but I think he might be part pug! Time to find out!”

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Genetic Breed Result

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French Bulldog

French Bulldogs, affectionately known by their many fans as Frenchies, are an immensely popular and well-known breed of dog. As their name implies, they are native to France and are the result of a mix between English Bulldogs and local dogs in Paris. They are very popular around the world, earning their place as the 4th most popular dog in the United Kingdom and the 9th most popular dog in the United States.

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Here’s what Fritz’s family tree may have looked like.
While there may be other possible configurations of his family’s relationships, this is the most likely family tree to explain Fritz’s breed mix.
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Health Summary

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Fritz is at increased risk for one genetic health condition.

And inherited one variant that you should learn more about.

Intervertebral Disc Disease (Type I)

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Fritz inherited both copies of the variant we tested

How to interpret this result

Fritz has two copies of an FGF4 retrogene on chromosome 12. In some breeds such as Beagles, Cocker Spaniels, and Dachshunds (among others) this variant is found in nearly all dogs. While those breeds are known to have an elevated risk of IVDD, many dogs in those breeds never develop IVDD. For mixed breed dogs and purebreds of other breeds where this variant is not as common, risk for Type I IVDD is greater for individuals with this variant than for similar dogs.

What is Intervertebral Disc Disease (Type I)?

Type I Intervertebral Disc Disease (IVDD) is a back/spine issue that refers to a health condition affecting the discs that act as cushions between vertebrae. With Type I IVDD, affected dogs can have a disc event where it ruptures or herniates towards the spinal cord. This pressure on the spinal cord causes neurologic signs which can range from a wobbly gait to impairment of movement. Chondrodystrophy (CDDY) refers to the relative proportion between a dog’s legs and body, wherein the legs are shorter and the body longer. There are multiple different variants that can cause a markedly chondrodystrophic appearance as observed in Dachshunds and Corgis. However, this particular variant is the only one known to also increase the risk for IVDD.

Canine Multifocal Retinopathy, cmr1

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Fritz inherited one copy of the variant we tested

What does this result mean?

This variant should not impact Fritz’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. Fritz is unlikely to develop this condition due to this variant because he only has one copy of the variant.

What is Canine Multifocal Retinopathy, cmr1?

This is a non-progressive retinal disease that, in rare cases, can lead to vision loss. Dogs with larger lesions can suffer from vision loss. CMR is fairly non-progressive; new lesions will typically stop forming by the time a dog is an adult, and some lesions will even regress with time.

Breed-Relevant Genetic Conditions

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Progressive Retinal Atrophy, crd4/cord1

Identified in French Bulldogs

Hereditary Cataracts

Identified in French Bulldogs

Urate Kidney & Bladder Stones

Identified in French Bulldogs

Additional Genetic Conditions

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Traits

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

Base Coat Color

Base Coat Color

Coat Color Modifiers

Coat Color Modifiers

Other Coat Traits

Other Coat Traits

Other Body Features

Other Body Features

Body Size

Body Size

Performance

Performance

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

Haplogroup

A1b

Haplotype

A18

Map

A1b

Fritz’s Haplogroup

This female lineage was very likely one of the original lineages in the wolves that were first domesticated into dogs in Central Asia about 15,000 years ago. Since then, the lineage has been very successful and travelled the globe! Dogs from this group are found in ancient Bronze Age fossils in the Middle East and southern Europe. By the end of the Bronze Age, it became exceedingly common in Europe. These dogs later became many of the dogs that started some of today's most popular breeds, like German Shepherds, Pugs, Whippets, English Sheepdogs and Miniature Schnauzers. During the period of European colonization, the lineage became even more widespread as European dogs followed their owners to far-flung places like South America and Oceania. It's now found in many popular breeds as well as village dogs across the world!

A18

Fritz’s Haplotype

Part of the large A1b haplogroup, we see this haplotype in village dogs in Central and South America, as well as French Polynesia. Among the breeds we have detected it in, this haplotype occurs most frequently in Chesapeake Bay Retrievers, Lhasa Apsos, and Pugs.

A1b is the most common haplogroup found in German Shepherds.

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Through Fritz’s Y-chromosome we can trace his father’s ancestry back to where dogs and people first became friends. This map helps you visualize the routes that his ancestors took to your home. Their story is described below the map.

Haplogroup

D

Haplotype

H7

Map

D

Fritz’s Haplogroup

The D paternal lineage is very common in well-known populations of dogs. Breeds belonging to the D lineage likely have direct male ancestors that can be traced all the way back to the origin of domestic dogs themselves! One popular breed that commonly sports a D lineage is the Boxer. Boxers were developed in the late 19th century from Mastiff dogs, so it is no surprise that D is well represented among Mastiffs, Bulldogs, as well as Terriers. Intriguingly, D is also found among Lhasa Apsos, an ancient Tibetan breed, and Afghan Hounds. While the presence of this lineage in Polynesia or the New World can be chalked up to interbreeding with European dogs brought during voyages of discovery or later settlement, D is also well represented among village dog populations in the Middle East and Africa. If the fact that we find dogs bearing a D lineage in the Middle East (not to mention the large amount of diversity among Middle Eastern D lineage males) is any indication of ancient residence in that region, then the presence among Oceanian village dogs is peculiar. Rather, it may be that D is part of a broader Eurasian group of ancient paternal lineages which disappeared from the eastern portion of its original range, persisting in the island of New Guinea as well as West Asia and Africa. With the rise of Mastiff breeds, the D lineage received a new life as it became common among many types of working dogs.

H7

Fritz’s Haplotype

Part of the D haplogroup, this common haplotype has been found in French Bulldogs, Afghan Hounds, Bull Terriers, and village dogs spanning from South America to Africa and into the South Pacific.

The D paternal lineage is common in Boxers.

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