We all know that in-kin marriage is prohibited in our country. The reason is very simple. In-kin marriage will lead to the appearance of many recessive pathogenic genes, which is very unfavorable to the physical health of offspring.
In fact, it is not just humans, but in nature, most species have evolved to avoid getting married in close relatives, that is, the strategy of back-crossing is to avoid deformities in offspring.
However, a human action is really hard to understand. We verbally oppose close relatives marriage, and we also know that nature has been implementing this strategy, but we have broken the entire strategy with our own hands.
The most obvious example is pet dogs. In order to cultivate a more likable pet house, humans will deliberately let dogs breed inbreeding, that is, backcrossing breeding strategy.
We all know that in nature, survival is the first element of all species. In order to survive better, offspring must have stronger competitiveness in order to win the cruel competition for survival of the fittest. If the offspring that reproduces become weaker and weaker, they will be eliminated soon.
It is in this case that the animal kingdom will avoid recent reproduction as much as possible. Only in some cases and in cases where it is forced to choose inbreeding.
So why are humans so "cruel" and deliberately let dogs breed inbreeding?
Dogs are domesticated animals, and their ancestors are wolves. People have achieved today's dogs through long-term domestication. A long time ago, dogs were not people's pets. Their main functions were hunting, helping humans to keep a look, etc. People did not have high requirements for the appearance of dogs.
With the development of human civilization, many families do not need dogs to come to visit their homes, nor do they need to hunt. More and more families are beginning to raise dogs as pets and emotional companions!
In order to highlight the uniqueness of dogs, various strange tricks began to emerge, and even related competitions appeared to show the uniqueness of dogs.
For this reason, people have also set relevant standards. Only more pure dogs are more likely to win in the competition and can also gain a more precious identity. Their prices will naturally rise and are favored by many people.
So, the market for pure dogs emerged. Driven by interests, people try their best to cultivate purer dogs. Pure dogs mean that dogs must be allowed to breed inbreeding. There is a very obvious data in
. Nowadays, more than 90% of dogs are artificially bred!
Although pure dogs satisfy people's curiosity and desires, they bring great hidden dangers to dog health. According to statistics, pure dogs are almost all diseases. For example, their stomachs and intestines are usually fragile and are more likely to have diarrhea symptoms.
The reason is obvious. As mentioned at the beginning, inbreeding is more likely to cause recessive pathogenic genes to occur. Although animals have eliminated many dominant pathogenic genes during their evolution, they still carry a large number of recessive pathogenic genes.
However, generally recessive pathogenic genes will not be shown, but inbreeding will greatly increase the probability of recessive pathogenic genes occurring!
This is why many people nowadays call on people not to pay too much attention to the pure dog market and not to let dogs inbreed. However, for many reasons, especially driven by interests, pure dogs are still very popular!
