Working together toward a better breed.
The Jack Russell Terrier Research Foundation
Risk of Being a Carrier if Related to an Affected Dog
(AUTOSOMAL RECESSIVE TRAIT)*
Relationship
|
Degree of Relationship
|
Minimum Carrier Risk
|
Parent, Progeny
|
1
|
100%
|
Full Brother / Sister
|
1
|
66.6%
|
Grandparents, Aunts, Uncles, Half-brothers or sisters, Grandchildren
|
2
|
50.0%
|
Niece, Nephew
|
2
|
33.3%
|
Great-grandparent, First Cousins, Half-aunts and uncles, Great-grandchildren
|
3
|
25.0%
|
Great-great-grandparents, First Cousin once removed, Second Cousins
|
-
|
12.5%
|
Great-great-great grandparent, First Cousin twice removed, Third Cousins
|
-
|
6.25%
|
*This chart is used for Autosomal Recessive Traits as well as Polygenic Traits – the risk for the Polygenic Trait will be "at least" this percentage.
