Cell membranes are based on the framework of fit base molecules called phospholipids which physically prevent water loving So D
DNA Polymerases type of enzyme ensures that the correct base for growing the chain is aligned with the template chain.
<h3>What is DNA Polymerase?</h3>
- The family of enzymes that catalyze the synthesis of DNA molecules from nucleoside triphosphates, the basic building blocks of DNA, includes DNA polymerase.
- These enzymes, which are required for DNA replication, typically function in groups to divide an initial DNA duplex into two identical copies.
- DNA polymerase "reads" the pre existing DNA strands throughout this process to produce two new strands that are identical to the preexisting ones.
- Deoxyribonucleotides, the components of DNA, are synthesized by DNA polymerase as its primary purpose.
- The nucleotides and bases found on each strand of the original DNA molecule are paired to form the DNA copies.
- This coupling always occurs in certain pairings, with cytosine and guanine constituting one pair and thymine and adenine forming the other.
- RNA polymerases, on the other hand, create RNA from ribonucleotides that are either found in RNA or DNA.
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Answer:
The evolutionary mechanism that could be influencing the allele frequencies between both islands and the mainland population might be Founder Effect.
Explanation:
Genetic drift is the random change that occurs in the allelic frequency of a population through generations. The magnitude of this change is inversely related to the size of the original population. These changes produced by genetic drift accumulate in time and eventually, some alleles get lost, while some others might set. Genetic drift affects a population and reduces its size dramatically due to a disaster -bottleneck effect- or because of a population split -founder effect-. In <u>founder effect</u>, a new population originates when a few individuals who are coming from a bigger population carrying its genes, settle down in a new area and reproduce. This small population might or might not be genetically representative of the original one. Some rare alleles might be exceeded or might be completely lost. Consequently, when the small population increases in size, it will have a genetically different composition from the original one. In these situations, <u>genetic variability is reduced</u> and there exists the possibility of developing a peculiar allelic composition. If the number of individuals that originated the new population is low, the founder effect will be very extreme, because the effects of the genetic drift are inversely proportional to the original number of individuals.
<em>In the exposed situation, the evolutionary mechanism that could be influencing the allele frequencies between both islands and the mainland population might be Founder Effect. The fact that both islands are similar in their frequencies might be due to little genetic variation on island 1, or because dispersion to island 2 is a recent event on time. </em>
