If your mother and father are both heterozygous for Huntington's disease, which is caused by a dominant allele, the

odds of you having the disorder are ____.



a. 1/4
b. 1/2
c. 3/4
d. 1
e. 0


ANSWER: c

Biology & Microbiology

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The cardiovascular system consists of ________.

A. The heart B. The blood C. The blood vessels D. All of the above are parts of the cardiovascular system

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Which of the following is a disease caused by a pleiotropic gene?

a. sickle-cell anemia b. pernicious anemia c. aplastic anemia d. iron deficiency anemia e. hemolytic anemia

Biology & Microbiology

The Michaelis constant (Kw) of an enzymatic reaction is _____.

a) a measure of the maximum number of substrate molecules that can be converted to products b) none of the choices is correct c) a measure of the infinity of the enzyme for the substrate under specific reaction conditions d) a measure of the substrate concentration at exactly one half of Vmax

Biology & Microbiology

Fimbriae and pili differ in that

A) there are only one or two pili per cell. B) pili are used for motility. C) pili are used to transfer DNA. D) pili are used for transfer of DNA and motility. E) pili are used for attachment to surfaces.

Biology & Microbiology