Question

Imagine a group of made-up organisms with a gene "G" that is related to their growth rate. Give a clear, detailed description of a scenario where all of the following are true. the G3 allele could be referred to as "dominant" in certain situations the G3 allele did not exist in this population until quite recently and it is very rare despite its rareness, the G3 allele has the potential to contribute to high fitness in the environment in which these organisms are found.

Answer 1

The G3 allele is dominant and contributes to high fitness to the organism. It has appeared recently in the population where most individuals have the normal 'G ' allele for growth.

The scenario could be that the G3 allele appeared due to a mutation in the normal 'G' allele. The allele was passed on to the next generations and since it provided better and improved fitness, such organisms were better able to survive. Even the presence of one G3 allele is able to provide better fitness to the organism, so it became dominant. It is still rare in the population because it originated recently and the individuals carrying this allele have yet to get distributed by overcoming geographical barriers and other factors which have a role in the natural selection process.