If a pedigree of several generations shows only females affected by a particular trait, it cannot be a(n) ____ trait
a. autosomal recessive
b. autosomal dominant
c. Y-linked
d. X-linked recessive
e. X-linked dominant
Ans: c. Y-linked
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A definitive identification of a pathogen typically includes:
a. a description of the colonial and micro-scopic morphology. b. a description of the colonial and bio-chemical reactions. c. a confirmatory set of reactions that corre-lates to the preliminary characteristics. d. a confirmatory set of reactions and anti-biogram for all organisms.
What is the blood type of individuals who lack antigens on their red blood cell surfaces?
A. A, Rh+ B. B, Rh+ C. AB, Rh- D. O, Rh-. E. O, Rh+
The class of an antibody is determined by the structure of its
a) antigen-binding site b) constant region c) variable region
Leaves:a
represent a fairly small fraction of the overall metabolic budget for a plant. b. depend on the roots to supply CO2. c. are the main photosynthetic organ of most plants. d. are the main site of water uptake in plants. e. prevent CO2 and O2 from entering the plant.