Risks of selective breeding: reduced genetic variation can lead to attack by specific insects or disease , which could be extremely destructive. rare disease genes can be unknowingly selected as part of a positive trait, leading to problems with specific organisms, eg a high percentage of Dalmatian dogs are deaf.
Why would selective breeding be bad?
Selective breeding can result in better quality products and higher yields in plants and animals that have been bred for specific characteristics. ... Disadvantages include a reduction in genetic diversity and discomfort for animals that have very exaggerated characteristics.
What are 3 disadvantages of selective breeding?
- It can lead to loss of species variety. ...
- It does not have control over genetic mutations. ...
- It brings about discomfort to animals. ...
- It can create offspring with different traits. ...
- It could create a genetic depression. ...
- It poses some environmental risks.
What are pros and cons of selective breeding?
Selective breeding is an extremely efficient way to good genetics in certain crops and livestock . However, if you are concerned about the cons of it, such as a genetic depression or discomfort to animals, the alternatives can be much worse, such as carrying out genetic modification.
How does selective breeding eliminate disease?
It involves breeding together more distant relatives , such as cousins. This reduces the rate at which the breed becomes ‘purebred', reducing the risk of ill-health that can sometimes be seen with purebred individuals.
What are two disadvantages of selective breeding?
- It may lead to a lack of variety in plant or animal species. ...
- Genetic mutations are still going to occur. ...
- The process of selective breeding becomes about humans only. ...
- There is no guarantee that the desired traits will pass to the offspring. ...
- It can create genetic bottlenecks.
Is selective breeding ethical?
Genetic engineering and selective breeding appear to violate animal rights , because they involve manipulating animals for human ends as if the animals were nothing more than human property, rather than treating the animals as being of value in themselves.
Who is responsible for selective breeding?
Selective breeding was established as a scientific practice by Robert Bakewell during the British Agricultural Revolution in the 18th century. Arguably, his most important breeding program was with sheep. Using native stock, he was able to quickly select for large, yet fine-boned sheep, with long, lustrous wool.
What are benefits of selective breeding?
- new varieties may be economically important, by producing more or better quality food.
- animals can be selected that cannot cause harm, for example cattle without horns.
Why does selective breeding take a long time?
Selective breeding leads to future generations of selectively bred plants and animals , all sharing very similar alleles which will reduce variation. ... Inbreeding can lead to a reduced range of alleles in the gene pool, making it more difficult to produce new varieties in the future.
How is selective breeding beneficial to humans?
Selective breeding, also known as artificial selection, is a process used by humans to develop new organisms with desirable characteristics . ... In fact, selective breeding is one of the earliest forms of biotechnology, and it's responsible for many of the plants and animals that we know today.
What are 4 examples of selective breeding?
- cows that produce lots of milk.
- chickens that produce large eggs.
- wheat plants that produce lots of grain.
Is selective breeding the same as GMO?
In selective breeding, the individuals have to be from the same species . In GMO the scientists create new combinations of genes. In selective breeding, genes combine on their own. ... Various forms of selective breeding have been used since the dawn of human society.
What are the four things that are necessary for selective breeding to occur successfully?
Explain the four things that are necessary for selective breeding to occur successfully. There are four things that are required: variation, inheritance, selection, and time . Variations are differences that exist among individuals.
Why is GM better than selective breeding?
Genetic modification is a faster and more efficient way of getting the same results as selective breeding. Improves crop yields or crop quality, which is important in developing countries. This may help reduce hunger around the world. ... The plant produces toxins, which would discourage insects from eating the crop.
How does selective breeding affect dogs?
The unnaturally large and small sizes of other breeds encourage different problems. ... For example, toy and miniature breeds often suffer from dislocating kneecaps and heart problems are more common among small dogs.
