Answer:
The correct answer is b. decreased genetic difference between the two populations
Explanation:
The gene flow between two population always reduce the genetic difference between the two population because it increases the homogeneity between the population.
If there is greater gene flow between the two populations genes will be shared and transferred between the individual of two population which will make the two gene pool to become more and more similar.
This will increase the fitness of both the population because more allele will add to the two populations. Therefore the correct answer is b.
In the coding region, natural selection tends to eliminate all of the mutations because of the high importance these regions have. The coding region contains genes that synthesize proteins and the changes in the DNA sequence can have devastating effects on the cell. Therefore, there are very few differences in the sequences of coding regions that can help us trace the lineage.
On the other hand, in the non-coding regions, the mutations often accumulate because they have little effect on the cell and the adaptive value of the organism. This enables us to trace up the lineage by comparing the sequences and seeing the differences in the sequences.
If our eyes were sensitive only to x rays the world would appear dark because X-ray light does not reach Earth's surface.
Less expensive source of energy is available.
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