If a woman who is a carrier for hemophilia (sex-linked recessive disorder) marries a man with hemophilia, what percentage of offspring would be affected by this condition?
a. 0%
b. 50%
c. 75%
d. 100%
b. 50%
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Prions are of significance because they cause infections of
A. plants. B. prokaryotes. C. domestic animals and humans. D. fungi.
The speciation of cichlid fishes of the same African crater lake is an example of
a. divergence. b. parapatry. c. gene flow. d. allopatry. e. sympatry.
Oxygen has an atomic number of 8. This
means that oxygen has 8
a. electrons in its outer most shell. b. neutrons in its nucleus. c. protons and 8 neutrons in its nucleus. d. protons in its nucleus. e. neutrons in its outer shell.
Taxonomists tend to use the ____ to characterize species for classification
a. morphological species concept b. biological species concept c. evolutionary species concept d. ecological species principle e. genetic species principle