The allele that causes Huntington's disease is expressed earlier in life when it is inherited from the father than when it is inherited from the mother. Huntington's disease is an example of
A. an X-linked trait.
B. pleiotropy.
C. gene imprinting.
D. linkage.
C. gene imprinting.
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Although a useful test in the past, the particle agglutination assay for the detection of H. influenzae, type b, capsular polysaccharide antigen is no longer reliable because of:
a. insufficiently high concentration of the organisms in clinical infections. b. a lack of sensitivity and specificity of the test procedure. c. the frequent use of antimicrobial therapy before collecting the specimen. d. the increased use of H. influenzae, type b, vaccination.
Which hormone is responsible for stimulation of metabolism?
a. growth hormone b. cortisol c. thyroxine d. parathyroid hormone
__________ are multicelled heterotrophs without cell walls. Fill in the blank(s) with the appropriate word(s)
The ________ pathway is important in early nonspecific responses to infection because it occurs in the absence of antibodies.
A) cell-mediated B) alternative C) clonal selection D) classic E) humoral