This is a basic process consisting of sound recognition, practice, and clarity. If this process is not followed properly the ability to speak or sing may not be fully acquired. Human infants learn language by listening to others in their environment speak; this is similar to young birds who are only able to learn the full song of their species if they hear the song sung by an adult bird. Birds exhibit different dialects depending on what population they are from, this is similar to humans language learning in two ways.

First, humans learn a different language depending on what language(s) they are most commonly exposed to as a young child. In addition, different geographical areas display different dialects of the same language, which children learn based on where they were raised. Both rids and humans also have sensitive learning periods for learning to sing or speak. Some birds show the ability to learn the song of neighboring populations in addition to the song of their own population, and learn to match the sound of the other population’s song.

Humans can learn to speak languages other than their first learned language and can often change the way their voice sounds to match the accent associated with that language. Experimental testing on white- crown birds by Merle showed that when young white-crowns were isolated from adult birds they were only able to make twittering visualization but did not learn he full song of their species. This may indicate a genetic component allowing birds to learn to sing but without the proper environmental conditions full song acquisition is not possible.

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Human infants show that they learn the language that those around them speak, indicating that, like birds, a genetic disposition towards speaking may be evident but without the proper environmental conditions speech may not be acquired properly. Another hypothesis concerns choosing a mate; when choosing a partner humans may unconsciously evaluate language ability. In birds it is proven that good male singers find mates more molly thus indicating that language or, singing in the case of birds, plays an important role in mating. 2. The environment must provide the chemical signal that turns the biochemical product of the ACE gene on.

The genes are transcribed to produce RNA. These RNA molecules are then translated to produce proteins, which are involved in the biochemical process of activating the ACE gene. Since there are many genes that are involved both directly and indirectly into the development of a person, it is unlikely that one single gene would determine whether someone is a good mountain climber or not. People who mountain climb must be more than just physically fit; mountain climbers must be good at navigating, work well under pressure, must be focused, and have good mental health, especially for climbing at high altitudes.

Climbers must also breathe in cold weather at high altitudes, which has lower oxygen content. The development of a single difference in the ACE gene that results in a change in alleles can stop the production of normal protein during translation. The activity of a single protein can influence genes downstream and therefore many other changes may be made that contribute to whether a person is good at mountain climbing or not. 4. Disdain’s main point was to show that selection is not random and that evolution is cumulative.

Offspring do not contain random variations of genes but rather small changes in a gene sequence accumulate over generations resulting in a new gene pattern, thus the selection is cumulative. This can result in a sequence that may be very different from the starting sequence. Artificial selection allows only certain plants or animals, usually, to breed that both contain particular traits. This is done so that the favorable traits seen in he parents will likely be exhibited in the offspring.

Disdain’s sentence analogy resembles artificial selection more closely than natural selection because each generation the computer chooses the sentence that most closely resembles Shakespearean sentence to be copied and used to produce a new generation of sentences, in this scenario the computer is able to directly choose the most favorable sentence. In natural selection this form of picking a favorable outcome does not occur in such a way, a trait that is valuable for the offspring naturally develops, as those who possess it may be more likely to produce offspring.

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