Heterozygotes for the sickle-cell allele show higher fitness than either homozygote genotype in malarial regions. This is an example of
A) epistasis.
B) pleiotropy.
C) founder effect.
D) overdominance.
E) codominance.
D
You might also like to view...
Antigens are _____
A) proteins found in the blood that cause foreign blood cells to clump B) proteins embedded in B cell membranes C) proteins that consist of two light and two heavy polypeptide chains D) foreign molecules that trigger an immune response E) proteins released during an inflammatory response
Most flowers produce both pollen and ovules
A. true B. false
Capillaries are
a. vessels found only in an open circulatory system. b. blood vessels with the largest diameter. c. blood vessels that transfer nutrients to tissues. d. only found in mammals, birds, and crocodilians. e. both a and c.
Anaerobic cellular respiration
A. is also called fermentation. B. only involves glycolysis. C. does not generate ATP. D. utilizes an electron transport system. E. uses the same final electron acceptors as aerobic respiration