Let's go back to the history and take an overview of what exactly happened, and why it happened.
Selective breeding began about 10,000 years ago, after the end of the last Ice Age. Hunter-gatherers began to keep flocks and herds and cultivate cereals and other plants. This process
of domestication was probably stimulated by a combination of human population pressure and environmental stress caused by a rapid change in the climate.
Humans have selectively bred plants and animals for thousands of years including:
crop plants with better yields
ornamental plants with particular flower shapes and colors
farm animals that produce more, better quality meat or wool
dogs with particular physiques and temperaments, suited to do jobs like herd sheep or collect pheasants.
Selective breeding often involves breeding individuals that are closely related, known as inbreeding?. Inbred populations are more likely to suffer from genetic conditions caused by recessive gene variants because they are more likely to inherit two copies of the recessive variants, one from each parent.
What is the difference between natural selection and artificial selection?
Natural selection as said is any selective process that occurs due to the fitness of an organism to its environment. basically chosen by nature. Whereas artificial selection is the selective breeding, imposed by an outside entity, typically humans, in order to increase the frequency of desired traits.