Phenotypic treatments for genetic disorders include

a. preventing the disorders in the carriers.
b. eliminating the defective gene.
c. preventing a disorder from being passed on.
d. preventing a disorder from being expressed.
e. all of these.


Answer: d

Biology & Microbiology

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Plants and algae contain this organelle not found in heterotrophs:

a. nucleus. b. mitochondria. c. chloroplasts. d. flagella.

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Four of the five answers listed below are

involved in engineering and expressing a recombinant DNA molecule. Select the EXCEPTION.

a. DNA ligase b. DNA polymerase c. restriction enzymes d. plasmid e. bacteria

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According to the Hardy-Weinberg principle, which of the following must be true for gene frequencies in a population to remain the same?

A) Mating is random. B) Mutations occur consistently. C) The population is small. D) Natural selection occurs.

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How many electron pairs are shared between carbon 2 and 3 in the accompanying figure?

a. one
b. one and a half
c. two
d. three
e. four

Biology & Microbiology