Question

What are advantages and disadvantages of natural selection and artificial selection?

Answer 1

Variation in the relative frequency of different genotypes in a small population, owing to the chance disappearance of particular genes as individuals die or do not reproduce.
2)Natural selection
Advantages:
1. Determines the fitness of an organism by direct application.
2. Employs a wide range of criteria
3. Provides for opportunism

Disadvantages:
1. Involves a lot of chance.
2. Some organisms escape the full range of possible criteria
3. Under employed in boom times, over-employed in lean times.
4. Recessive traits 'hide' from the process.


Artifical selection
Artifical selection is the process of interntional, or unentitional modeifcation of a species through human actions which encourage the breeding of certain traits over others.

Some disadvantages of artificial selection is that it is inhumane, can cause mutations or produce new problems. An example of the inhumane process is the new way of breeding chickens. These chickens are produced without fethers. Critics say the feather-free chickens will suffer more than normal birds. Males might be unable to mate, because they cannot flap their wings, and "naked" chickens of both sexes are more susceptible to parasites, mosquito attacks and sunburn.