The presence of several distinct forms within a population—such as A, B, O, and AB blood types—is termed:
A. pleiotropy
B. polytypy
C. polymorphism
D. none of these
C. polymorphism
You might also like to view...
The "Nariokotome boy" fossil indicates that H. erectus __________
a. could grow as tall as modern humans b. had short lower limbs c. was thin-boned d. was very ill
In the United States, legislation allowed for the involuntary sterilization of "mental defectives."
a. True b. False
Which of the following statements about HIV is false?
A. Some biologists believe that HIV is at least as powerful a selective agent as malaria B. The CCR5 gene codes for cell-surface receptors and affects a person's susceptibility to HIV C. A gene that may offer some protection against HIV is found in northern European populations, but rarely in Africa D. North America has the highest number of young adults with AIDS
According to Scheper-Hughes in "Mother's Love: Death Without Weeping," poor Brazilian mothers living in a shantytown near the town of Bom Jesus de Mata
a. would do almost anything to earn money in order to pay for the treatment of their sick babies. b. stayed emotionally detached from their babies, particularly those they felt were likely to die. c. depended for child support on the local churches and civil authorities. d. observed nearly a year of formal mourning when a child died, during which time they were not allowed to dance or laugh in public.