Two people (BOTH heterozygotes) are able to taste a chemical substance called PTC. The ability to taste PTC is caused by a dominant allele (T). The inability to taste PTC is caused by a recessive allele (t). What proportion of their children would be expected to have the ability to taste PTC?
a. 3/4
b. 1/2
c. All
d. 1/4
e. 2/3
A
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The two basic types of cells are somatic cells and:
a. organelles. b. polar bodies. c. gametes. d. autosomes. e. zygotes.
Which of the following best describes free radicals?
a. accumulations in mutations over time b. molecules with unpaired electrons c. the pleiotropic effects of certain genes d. disposable soma
The western style of performing music in concert halls has been noted by Shannon to __________
a. divorce ethnic and traditional music from its "lived" context b. make it possible to concentrate on the music more completely c. improve the sound quality of music that otherwise may be poorly performed d. be largely unsuccessful and unpopular
Which of the following best describes ethnic conflicts?
a. They are based on age-old hatreds and grievances. b. They almost always come down to personality clashes between individuals. c. They are shaped by politics, economics, and history. d. Because of their nature, they can rarely be successfully mediated. e. They are almost always based on shared misunderstanding.