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Dogs come in all shapes and sizes - and the squat, muscular pit bull terrier, with its sharp row of teeth, is more than a little controversial.

Both the ownership and breeding of pit bulls is banned in the UK due to the Dangerous Dogs Act of 1991.

They're not the only breed that's outlawed, either. But why is it that you're not allowed to call one your pet?

In 1991 the Government decided to ban pit bulls in response to a slew of incidents involving vicious, often unprovoked attacks, by this particular breed of dog, on humans.

There were 15 fatal dog attacks in England and Wales alone between 1981 and 1991.

The other three breeds that were outlawed in this Act were the Japanese Tosa, Dogo Argentino and Fila Brasileiro. Cross-breeds of the four types are also banned.

However, it is up to a court to determine whether the physical characteristics of a specific dog mean that it should be prohibited.

If the court decides the dog is fine for ownership, the animal must still wear a muzzle, be kept on a lead in public, as well as being registered and insured, neutered, tattooed and fitted with a microchip implant.

Though there is no scientific backing for the presumption these dogs are more aggressive or dangerous than any other breed, they have been favoured as pets by criminals, many of whom train them as attack dogs.

However, many other breeds like Alsations, Rottweilers and Dobermans have a similar past and reputation, but are not banned.

Even if you do have an exemption allowance to own a pit bull, you cannot breed them, sell them or exchange them.

MORE: Why is Crufts called Crufts and how long has it been running?

MORE: Crufts live stream: How to watch crufts online and on TV

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Dogs come in all shapes and sizes - and the squat, muscular pit bull terrier, with its sharp row of teeth, is more than a little controversial. Both the ownership and breeding of pit bulls is banned in the UK due to the Dangerous Dogs Act of 1991.

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Write your idea about selective breeding based on the activities.  Then read your friend's idea and post your comments.

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The Bizarre Truth About Purebred Dogs (and Why Mutts Are Better) - Adam Ruins Everything

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The Bizarre Truth About Purebred Dogs (and Why Mutts Are Better) - Adam Ruins Everything

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The Bizarre Truth About Purebred Dogs (and Why Mutts Are Better) - Adam Ruins Everything

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11 Selective Breeding Advantages and Disadvantages

navajocodetalkersadmin on June 25, 2015 - 7:13 pm in Pros and Cons

Science has come further than we could have ever imagined in the past couple of decades. Selective breeding has been just one of the products of this advancement. Selective breeding is when plants or animals are bred for specific traits. These traits could be physical such as a fur color, or they can be more useful, such as an increase in milk production. There are many uses for selective breeding, some more beneficial than others, but still many people are opposed to the idea.

The Advantages of Selective Breeding

1. A Removal of Unwanted Traits
One of the biggest benefits of using the process of selective breeding is the fact that you can effectively breed out traits that are unwanted. Things like illness, health problems, and production problems can all be eliminated from a group of animals with selective breeding.

2. More Crops Means Lowered Prices
When used with plants, crops can be manipulated into producing much higher yields. This is great for a wide variety of reasons, including a drop in price for consumers. This is the most commonly used form of selective breeding.

3. Expand Living Conditions
In order for a plant, crop, of animal to thrive they have to be in the correct conditions and climates. This all changes when you factor in selective breeding. The animals that can withstand colder or hotter weathers can be bred specifically to pass on that trait. Once done a few times, you have a set of animals or plants that can survive and thrive in harsh climates.

4. Profits Come First
More profit is possibly the biggest driving factor when it comes to selective breeding. Since you can condition plants and animals to provide a larger yield of products. Since there is a higher amount of product being produced, the profits that are gained by the farmers are higher, which helps our economy.

5. Higher Quality Food
The quality of the food that is produced is also improved by using selective breeding. The fat percentage of meat can be reduced and the vitamin content of crops can increased. Scientists have managed to even add new nutrients into foods where they did not exist before.

6. It's A Safe Practice
The process of selective breeding has been used for thousands of years. People are very comfortable with it's use in agriculture because of this, there is no unnatural modifications to the animals or plants.

The Disadvantages of Selective Breeding

1. Inbreeding Problems
The largest argument against the use of selective breeding is the risk of inbreeding. Inbreeding is when you mate two animals who have direct, blood, relation to each other. This is something that almost always has to be done in order to obtain the characteristic that is being aimed for. Inbreeding causes severe mental and physical problems and illnesses in animals.

2. Diversity Is Lost
Diversity is another thing that is negatively affected by the use of selective breeding. Since the purpose is to breed in or out traits, you can lose some all together. Whether you are talking about humans, animals, or plants, diversity is a necessity for the longevity of the species.

3. Things Naturally Evolve
Natural evolution occurs in nature over time. This is so that the species can adapt to a changing environment. When you use selective breeding, you take away the ability for a natural process to cause the animals to evolve. This could easily cause important evolution to not occur.

4. Health Concerns
The effects of consuming food products that came from animals or plants that have been selectively bred have not been thoroughly researched. This fact has been causing many eyebrows to begin to raise. Anything that we consume on a regular basis should be thoroughly evaluated for it's long term health effects.

5. Extremely Time Consuming
In order to successfully obtain the trait that you are looking for, it can take years. This is because you have to mate the animals, wait for the offspring to be born, and determine whether or not the trait was passed on. This process is often repeated many times in order to be successful.

Important Facts About Selective Breeding

Show dogs are the most common selectively bred animals in the world.

Behavior issues are a common trait among animals that have been selectively bred, as well as mental health issues.

Fruits and vegetables that have crazy or unique coloring are a product of selective breeding.

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11 Selective Breeding Advantages and Disadvantages | Navajo Code Talkers

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navajocodetalkersadmin on June 25, 2015 - 7:13 pm in Pros and Cons Science has come further than we could have ever imagined in the past couple of decades. Selective breeding has been just one of the products of this advancement. Selective breeding is when plants or animals are bred for specific traits.

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Selective Breeding | Biology for All | FuseSchool 

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Selective Breeding | Biology for All | FuseSchool 

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Selective Breeding | Evolution | Biology | FuseSchool

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Also referred to as artificial selection, selective breeding is the practice done by agriculturists and farmers wherein animals or plants are chosen to breed and produce offspring that have specific traits or characteristics. This process had been applied hundreds of years ago and is still very much in existence today. However, there are also pros and cons associated with this breeding method.

List of Advantages of Selective Breeding

1. It can result to more produce and agricultural products.
One of the advantages of selective breeding is the possibility of gaining higher profit with the process. An example is when cows that have the characteristics to produce more milk other traditionally bred cows are selectively bred. These cows will produce offspring that will also have the same traits. Same goes with plants that undergo the process. If plants or varieties bear abundant fruits or crops, they can be breed selectively to produce more crops that can be sold for higher profit.

2. It can eliminate control diseases in plants and animals.
Studies have shown that with this process, there is a big possibility of eradicating diseases since the farmers are given the opportunity to identify plants and animals that have diseases or have disorders. This way, the producers will be able to control the growth and population of their crops and livestock because the offspring will come from healthy parents.

3. It can result to superior breed.
With the process of choosing particular animals and plants that show characteristics that are specific to the preference of the breeder or farmer, say, chickens that lay large eggs or dogs that have champion blood lines, the chances of producing better breed of plants and animals are higher.

List of Disadvantages of Selective Breeding

1. There is the possibility of genetic mutation.
One disadvantage that is seen by experts is the lack of control in preventing the offspring from having unfavorable traits. An example is when genetic mutation occurs in planted crops. The sad part is, most of these mutations do not offer benefits. In this method or process, the formation of genes cannot be controlled or regulated.

2. This can result to the lost of genes from the genetic pool.
Since animals and plants will be chosen for their certain characteristics and bred with other species that also have specific traits, the offspring might be entirely different. Consequently, there is the risk to lose some of the genes coming from the parents and in the end, it will be difficult to bring it back to the next generation.

3. This can result to risks of having diseases.
Selectively bred animals and plants can lead to offspring having similar genes and at the same time, it will result to diseases becoming more dangerous. Aside from this, there is also an increased possibility of having genetic diseases like cystic fibrosis caused by recessive alleles.

Selective breeding has both advantages and disadvantages. Despite the existence of benefits and setbacks, this process still remains to be significant and is still helpful in many ways. What is important is for the breeders to make the appropriate choices to ensure the pros outweigh the cons.

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6 Advantages and Disadvantages of Selective Breeding

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Also referred to as artificial selection, selective breeding is the practice done by agriculturists and farmers wherein animals or plants are chosen to breed and produce offspring that have specific traits or characteristics. This process had been applied hundreds of years ago and is still very much in existence today.

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Get the information about Selective Breeding from video.

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Disadvantages of Selective Breeding.

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Advantages of Selective Breeding.

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What is "Selective Breeding"?

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WHAT DOES SELECTIVE DOG BREEDING MEAN?                            - Disadvantage - 

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WHAT DOES SELECTIVE DOG BREEDING MEAN?                            - Disadvantage - 

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https://breedingbusiness.com/selective-dog-breeding/

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Disdvantages of Artificial Selection in Dog Breeding

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Artificially Selecting Dogs - What is Selevtive Breeding?　                                             

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Artificially Selecting Dogs - What is Selevtive Breeding?　                                             

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http://www.ucmp.berkeley.edu/education/lessons/breeding_dogs/
Author: Jennifer Johnson Collins

Dogs belong to a single species, canis familiaris (学名で「犬」), but that species is comprised of（∼で構成されている） about 400 different breeds. Since they are a single species, they can mate and have viable offspring (生存可能な子孫). Recognized dog breeds (認定された犬種) take generations to establish through selective breeding or artificial selection. Many of the breeds we have today are the result of people's desire to have dogs with specific features that make them suitable for performing particular tasks, such as herding, protection, assistance, hunting, and companionship, and so on. The process of breeding a new type of dog often involves identifying desired features, finding dogs with those features, then performing a series of mating (交配) to produce offspring with the appropriate combination of traits. After a number of generations, a new breed may be established.

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WHAT DOES SELECTIVE DOG BREEDING MEAN? - Advantage  

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WHAT DOES SELECTIVE DOG BREEDING MEAN? - Advantage  

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https://breedingbusiness.com/selective-dog-breeding/

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Advantages of Artificial Selection in Dog Breeding

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English bulldogs are in trouble.    by New Scientist

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English bulldogs are in trouble.    by New Scientist