Multiple Choice
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
A) the results of poor nutrition and medical care.
B) how the different races are differently adapted.
C) the founder effect.
D) gene flow.
Correct Answer:
Verified
Correct Answer:
Verified
Q2: The frequency of the sickle cell allele
Q3: The sickle cell gene,a genetic lethal,is found
Q4: Sickle cell anemia is found<br>A)only in blacks.<br>B)only
Q5: Mutations are<br>A)always harmful.<br>B)always more beneficial than previous
Q6: The adaptive fitness of a mutation is
Q8: Genetic drift is more effective in<br>A)large populations.<br>B)populations
Q9: The form of genetic drift that involves
Q10: The mutation that leads to sickle cell
Q11: Gene flow occurs when<br>A)a population splits in
Q12: Mutations<br>A)occur at random.<br>B)happen when they are needed