Sentences with phrase «with small gene pools»

In breeds with small gene pools, as is the case with many pure breeds, elimination of identified carriers may not be the best strategy, as genetic diversity would become dangerously compromised.

So a breed with a smaller gene pool (and thus less genetic variation) would be more likely to have a recessive disorder.

Tollers started out with a small gene pool so they do have some genetic problems.

Unfortunately, with the small gene pool comes the exacerbation of the deleterious impact of inbreeding depression especially over time.

It is thus a genetic isolate, with a small gene pool, significant inbreeding, and pedigrees with multiply overlapping generations.

With a small gene pool of thirteen dogs, Shih Tzus made their way to Europe in 1952.

A closed registry with a small gene pool undergoing a further tightening due to sire selection and overuse guarantees inbreeding and a steady increase in the occurrence of negative genetic issues.

Not exact matches

Those with naturally bigger teeth will be better able to utilize this food resource, allowing them to survive when members of their group with smaller teeth starve, thus leaving the big toothed ones to prosper and reproduce, thus increasing the frequency of big teeth genes in their gene pool.

Even if Noah impregnated all of them at once, or his sons did their respective wives, and then they all repeated the process 14 years later (give or take) when the 1st offspring became fertile, how could different races with distinct physiological adaptation arise from such a small, virtually identical gene pool 4,000 years ago?

This could either be an advantage as there may be more serious people on it or a disadvantage that the gene pool is too small or people have just joined for curiosity to start with.

European breeders were concerned that there was such a small gene pool to work with and decided to crossbreed the American Burmese with the Siamese cat.

To accomplish this Bell says that breeds with small populations (LE list) need a mentoring program for their puppy buyers because healthy gene pools require genetic diversity and the careful selection of sires and dams in order to produce the desired traits and avoid the deleterious mutations that accompany unwanted traits and diseases.

Learn about why breeds with large and small gene pools should pay attention to what is happening in their breed.

What happens when all of these variants, with a now small gene pool, are bred together to «perfect» this narrow portion of the standard?

Like other breeds with a very small gene pool, some of these issues may be compounded and widespread.

Along the way, Bostons were further cross-bred with other breeds such as French Bulldogs and even the mighty English Mastiff in order to bring new blood into what had become a very small gene pool.

Pocket Beagles are either selectively bred from purebred Beagles that are exceptionally small (which is not recommended because smaller size is frequently associated with more health problems), or they are the result of mix breeding Beagles to other small breeds such as Chihuahuas or Dachshunds (which is not recommended because you are introducing unpredictable temperament and health conditions from those breeds, into the Beagle gene pool).

It has to do with genetics and a smaller gene pool.

When dealing with common breeds involving large, diverse gene pools, identified carriers can be eliminated with small risk of adversely narrowing the gene pool.

However, dog breeds generally are characterized by closed breeding and relatively isolated populations, often with a small number of founders and popular sires whose gene pool is overrepresented in modern - day progeny.

However, with only a small gene pool to draw upon, a genetic bottleneck was created, potentially causing the present - day problems of congenital defects such as cleft palates, spinal deformities and heart, brain and eye deformities.