What muscular disorder is characterized by a progressive weakening of the muscle cells due to a faulty gene on the X chromosome?
a. Polio
b. Tetanus
c. Muscular dystrophy
d. Amyotrophic lateral sclerosis
e. Botulism
c
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The theory of chromosomal inheritance was first proposed by
A. Mendel. B. Morgan. C. Knight. D. Sutton. E. Stern.
Which of the following is never used for DNA typing?
A. PCR B. gel electrophoresis C. VNTR D. RFLP E. All of these can be used for DNA typing.
Which characteristic applies to tropical rain forests?
a. Little sunlight reaches the forest floor. b. Diversity is limited because the tall forest canopy shuts out most of the incoming light. c. Conditions are extremely favorable for growing luxuriant food crops. d. Competition for resources is extremely low. e. Temperatures vary greatly.
If a man and his wife are affected with a dominant trait, then ____________________ of their children
could be unaffected. Fill in the blank(s) with the appropriate word(s).