Breeders Corner
Kafka said, "All knowledge, the
totality of all questions and
answers, is contained in the dog."
Please submit your article,
publication or hyperlink to an
article to Judi Hartell.
DataDawg@Austin.rr.com
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The Bluebonnet Norfolk Terrier Club does not recommend,
guarantee, endorse, nor rate these recommendations or
contributors, their kennel or their stock. The purpose of this section
is to share the knowledge and experience of breeders who have vast
experience in whelping and raising puppies. The tips and tricks
below are intended to augment qualified veterinarian care, not as a
substitute for qualified veterinarian care of the dam and puppies.
Complex Modes of Inheritance
(e.g. Polygenic traits)
Many diseases that are of great concern to both breeders and veterinarians are
caused not by a single gene but by the interactions of several genes. To make
matters more difficult for the breeder and the geneticist, the phenotype (or the
appearance of the trait or disease) can often be modified by environmental
influences such as nutrition or exercise. Examples include hip dysplasia, elbow
dysplasia, heart disease and epilepsy.
Breeders and owners must take an active part in the screening processes for
genetic traits in order for the incidence of these traits to be reduced or, if
possible, eliminated from purebred dogs.
Open reporting of health information, through databases such as CHIC,
ultimately will provide the information necessary to perform objective relative-
risk pedigree analysis.
From fxhntnorwich.
Here is a link for a basic genetic mode of inheritance taught in most freshman
science classes.
The graph shows a basic mode of inheritance for pea seeds. Most of us can interpolate
the theory and see the correlation for inheritance of the fluffy gene/ allele as we are
not sure it is a simple recessive . The percentages are NOT 25% : 50% : 25% for the
entire litter but for EACH individual puppy.