Two European men and two Polynesian women settled on a previously uninhabited tropical island. All four of the settlers have bro
wn eyes, a dominant trait, but one of the Europeans is heterozygous and carries the recessive gene for blue eyes. No new settlers arrive,and nobody leaves the island.After a few generations,the percentage of blue-eyed individuals increases from the original zero to 25 percent.This is probably due to which of the following factors?
A) genetic drift
B) mutation
C) gene flow
Two European men and two Polynesian women settled on a previously uninhabited tropical island. All four of the settlers have brown eyes, a dominant trait, but one of the Europeans is heterozygous and carries the recessive gene for blue eyes. No new settlers arrive,and nobody leaves the island.After a few generations,the percentage of blue-eyed individuals increases from the original zero to 25 percent.This is probably due to which of the following factors?
genetic drift
Explanation:
Genetic drift entails when there are changes in the gene frequency which occur in a gene that is existing. From the analogy above, it is a known fact that only gneetic drift could allow such to happen as mutation will only occur with a sudden change of gene which is not the case described above
There are several information's of immense importance already given in the question. Based on those information's the answer can be easily deduced. Initial number of bacteria in the culture = 1000 Number of bacteria after t hours = 1000 (2)^t Then 1000 (2)^t = 50000 2 ^t = 50 t = 5.6
I hope the procedure is clear enough for you to understand.
