Most polymorphisms do not result in a phenotypic difference because they are typically
A) nonsense mutations.
B) either missense or neutral mutations.
C) either silent mutations or are in non-coding regions.
D) either missense mutations or are in promoter regions.
C) either silent mutations or are in non-coding regions.
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Influenza pandemics occur cyclically because
A) less than 100% of the population is immunized. B) new strains emerge due to reassortment between bird, swine, and human variants. C) the vector is seasonal. D) there are environmental reservoirs that release the virus during particular seasons.
If a pedigree analysis suggests that an autosomal or X-linked inheritance pattern is equally likely, then additional
genetic testing is needed to identify the pattern of inheritance. a. True b. False
Mitochondria use inspired oxygen as an electron acceptor in the process known as:
a. pulmonary ventilation. b. cellular respiration. c. external respiration. d. internal respiration. e. anaerobic respiration.
When sperm enter the epididymis, they ________
A) come from the vas deferens B) are mature C) are ready to fertilize an egg D) are incapable of moving on their own