A population of 1,000 birds exists on a small Pacific island. some of the birds are yellow, a characteristic determined by a

Question

A population of 1,000 birds exists on a small Pacific island. some of the birds are yellow, a characteristic determined by a recessive allele. The others are Green, characteristic determined by a dominant allele. A hurricane on the island kills most of the birds from this population. Only ten remain, and those birds all have yellow feathers. Which of the following statements is true?  
a. The hurricane has caused a population bottleneck and a loss of genetic diversity.
b. This situation illustrates the effect of a mutation event.
c. Assuming that no new birds come to the island and no mutations occur, future generations of this population will contain both green and yellow birds.
d. There has been no change in allele frequency.

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