Many domestic animals and plants are the result of centuries of selective breeding. Disadvantages include a reduction in genetic diversity and discomfort for animals that have very exaggerated characteristics. Selective breeding means choosing the plants or animals that have the most pronounced desirable characteristics and breeding them.
Genetically Modified Organisms ( Gmos )
When the process is repeated with the descendants of the selected parents and again over several generations, the desirable characteristics develop more and more. For example, today's dairy cows are the result of many years of selective breeding. The cows that gave the most milk were bred, and when their calves started producing milk, the calves that gave the most milk were bred as well.
Over the years, always selecting for breeding the cows that produced the most milk resulted in cows that produce much more milk than the average non-bred cow. The many breeds of dogs are an example of how selective breeding can develop certain traits. For a large breed, larger than average males are bred with larger than average females.
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Over many generations, a larger breed results. The same effect occurs when dogs with unusually long hair are selectively bred and a long-haired breed results.
The selective breeding of dogs - OpenLearn - Open University
Selective breeding can take a long time but is very effective. Selective breeding has been used for plants and animals that are sources of food, for making animals suitable for specific types of work, for making plants produce certain substances and for decorative effect. In each case there has to be an initial characteristic present in the plant or animal that is then augmented through selective breeding. In the case of food plants, selective breeding increases the yield and the quality of the harvest.
For example, selective breeding of corn increased the size of the kernels and the number of ears. For non-food plants such as tobacco or cotton, selective breeding increased the yields and introduced varieties. Decorative plants such as roses and tulips were bred for large flowers and different colors. The benefits of selective breeding in plants include abundance of food, new types of products and a wide variety of decorative house plants. Selective breeding in animals has served different purposes.
Food animals such as pigs and turkeys are bigger, more tender and grow faster.
Work animals such as horses and some breeds of dogs were bred for specific tasks. Male Labrador Retriever has reached its maximum.
The Biological Ideas Of Selective Breeding Essay
Beginning in the s, curly coat hounds are one of the oldest hound dog breeds. They are multipurpose hound dogs and are versatile multipurpose hound dogs equally suitable for use on land or water.
Like most harvest species, Curly shoots in front of the hunter to wash highland birds with comfortable gun range. Cocker Spaniel in the UK is well trained to attack highland wildlife and is trained in gun consolation in front of the hunter. Despite their height, they breed and capture the dense high altitude sheath.
They are multi-purpose hunters, but usually like calm temperatures to hunt waterfowl. Due to selective breeding and use of several generations, its diverse intelligence is decided. You can see it at the Labrador retriever. They are now named for smart, high energy dogs and excellent big dams. This breed is used as a hound dog or a domestic dog. There may be both combinations, but the intelligence between the two is very different. This water loving dog got his name from the Chesapeake Bay along the history of breeds they bred to hunt ducks.
Although not as famous as Labrador and Golden Retriever, this breed has all the qualities that makes hounds cute: intelligence, motor skills, and infinite goodness. Raccoons are wonderful believers, depending on their sense of smell to help their fellow men find their prey. They may consist of two other wonderful tracking varieties - Foxhound and Hound - and are named for their preferences for smaller games like raccoons. However, this breed is known to be fearless and is often used to hunt large games such as deer.
Golden retriever was originally produced in Scotland in the mid-nineteenth century. Back then, wild poultry hunting was a popular sport for wealthy Scottish elite, but existing hound dog species were not enough to collect shots from water and land.