Subtle differences in DNA sequences that vary from person to person are called ________
A) genomics
B) chromosomes
C) DNA microarrays
D) pharmacogenomics
E) single-nucleotide polymorphisms
E
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Imagine that a man is scratched by his cat. A phagocyte near the scratch site recognizes and engulfs a bacterium. Shortly thereafter, more phagocytes arrive in the tissue surrounding the scratch. Why? Select all correct choices
A. Other phagocytes are recruited to the scratch site by antigens secreted by the bacteria. B. Other phagocytes are recruited to the scratch site by cytokines produced by the bacteria. C. Other phagocytes are recruited to the scratch site by antigens secreted by the initial phagocyte. D. Other phagocytes are recruited to the scratch site by cytokines secreted by the initial phagocyte.
Nearly all dinosaurs became extinct as a result of direct competition with mammals
A. true B. false
The distribution of highly competitive animals is
likely to be a. clumped. b. random. c. uniform. d. constant. e. homogeneous.
Which of the following is NOT true concerning homologous chromosomes?
a. There are two of each kind. b. Each parent contributes one of each homologous pair. c. Most homologous chromosomes carry the same genes for the same traits. d. The number of homologous chromosomes is doubled in each generation. e. Homologous chromosomes pair up during early meiosis.