Risks of selective breeding include: 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.

Eugenics is essentially selective breeding applied to humans. For thousands of years, animal breeders have carefully chosen which individuals to breed, creating dog breeds that vary from tiny Chihuahuas to huge great Danes.

Selective breeding

• cows that produce lots of milk.
• chickens that produce large eggs.
• wheat plants that produce lots of grain.

• Deer Mouse.
• Warrior Ants.
• Peacocks.
• Galapagos Finches.
• Pesticide-resistant Insects.
• Rat Snake. All rat snakes have similar diets, are excellent climbers and kill by constriction.
• Peppered Moth. Many times a species is forced to make changes as a direct result of human progress.
• 10 Examples of Natural Selection. « previous.

Artificial selection has long been used in agriculture to produce animals and crops with desirable traits. The meats sold today are the result of the selective breeding of chickens, cattle, sheep, and pigs. Many fruits and vegetables have been improved or even created through artificial selection.

Can you breed humans? Yes, of course you can. It has been made sometimes in history. For example with slaves in ancient civilizations, or in Nazi Germany.

Today on Earth 99% of multicellular creatures – the big organisms we can see – reproduce sexually. Even with all this mesmeric diversity, all sexually reproducing organisms follow the same basic route to make new offspring – two members of the same species combine their DNA to produce a new genome.

Answer. The answer is Selective Breeding.

The origins of dogs date back thousands of years, having evolved as domesticated descendants of the wolf, whereas modern dog breeds date back to the late 19th century. Prior to the Victorian era, there were different types of dogs that were defined by their function.

Breeding becomes a hobby Breeding as we know it today is a fairly recent invention. For the most part, it wasn’t until the 19th century that people began to keep records of canine bloodlines and to classify dogs into specific breeds rather than generic types such as hunting dog, hound, herding dog, or lap dog.

Darwin thought that natural selection progressed slowly and only occurred over a long period of time. This may often be true, but it has been shown that in some cases a new species can evolve within a lifetime.

Explanation: The idea that organisms can evolve by micro and macro evolution is a fact. Natural Selection is a theory because it is backed by observable evidence but is not considered the definite cause as to why organisms can evolve due to surrounding debate.

Natural selection is a simple mechanism that causes populations of living things to change over time. In fact, it is so simple that it can be broken down into five basic steps, abbreviated here as VISTA: Variation, Inheritance, Selection, Time and Adaptation.

Natural selection is the process in nature by which organisms better adapted to their environment tend to survive and reproduce more than those less adapted to their environment. For example, treefrogs are sometimes eaten by snakes and birds.

Natural selection is the process through which populations of living organisms adapt and change. Individuals in a population are naturally variable, meaning that they are all different in some ways. This variation means that some individuals have traits better suited to the environment than others.

Limits to variation The most obvious limit to natural selection is that suitable variation may not be available. This may be because certain phenotypes cannot be built, being ruled out either by physical law or by the properties of biological materials.

Natural selection is a central concept of evolution. The English biologist Charles Darwin and Alfred Russel Wallace, and is sometimes called the survival of the fittest. Darwin chose the name as an analogy with artificial selection (selective breeding).

Natural selection occurs when individuals with certain genotypes are more likely than individuals with other genotypes to survive and reproduce, and thus to pass on their alleles to the next generation. There is variation among individuals within a population in some trait.

The essence of Darwin’s theory is that natural selection will occur if three conditions are met. These conditions, highlighted in bold above, are a struggle for existence, variation and inheritance. These are said to be the necessary and sufficient conditions for natural selection to occur.

Darwin’s process of natural selection has four components.

• Variation. Organisms (within populations) exhibit individual variation in appearance and behavior.
• Inheritance. Some traits are consistently passed on from parent to offspring.
• High rate of population growth.
• Differential survival and reproduction.