Exam 4: The Processes of Evolution

When a population splits into two or more new populations,the process is

The frequency of the sickle cell allele is related to culture in that

The sickle cell gene,a genetic lethal,is found in high frequency in some areas because

Sickle cell anemia is found

Mutations are

The adaptive fitness of a mutation is based on

Even though sickle cell confers no advantage in the malaria-free U.S.,African Americans have a relative high incidence of the gene.This is an example of

Genetic drift is more effective in

The form of genetic drift that involves alleles passed on to new generations in frequencies unlike those of the parents' generation is called

The mutation that leads to sickle cell anemia is an example of

Gene flow occurs when

Mutations

Members of the same species

Evolution takes place within

When the gene pools of two populations mix,producing a gene pool with new allele frequencies,the process is called

In the example of Darwin's finches,there were changes in beak size because

The abnormal allele for sickle cell is

When new sets of allele frequencies result from population fissioning,the result is called

We sometimes have difficulty determining the identity of species because

In terms of evolutionary success,sickle cell anemia may be considered