One use of PCR has been to monitor the trafficking of endangered organisms
Suppose that one suspect was accused of illegally importing a specific animal, but the suspect asserts that the young animal had been bred in this country from two resident zoo animals. How would you best proceed? A) Use blood cells to obtain DNA from the animals and look for sequences found only in illegally traded ones.
B) Use DNA obtained from biopsy of the suspect organism and use a probe for infectious agents found more frequently in its native country.
C) Use DNA obtained from the possibly imported animal and treat with restriction enzyme; use a probe for disease genes common in its native country.
D) Use DNA from hair follicles of supposed zoo parents and of the supposed offspring to compare sequences amplified with primers for a highly polymorphic region.
E) Amplify highly polymorphic regions from zoo and native populations to compare with the suspect organism.
D
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Early investigators associated the tendency to violent criminal behavior with the ____________________ karyotype, but there is no evidence of a direct link between the two
Fill in the blank(s) with correct word
Genes that are highly conserved are
A) found in a wide range of species. B) repeated many times in a genome. C) found in humans only. D) deleted by natural selection.
The contractile ring that works with animal cells could not work with plant cells because __________. Fill in the blank(s) with the appropriate word(s)
Select the pathway that would lead to the activation of cytotoxic T cells
A) B cell contact antigen ? helper T cell is activated ? clonal selection occurs B) body cell becomes infected with a virus ? new viral proteins appear ? class I MHC molecule-antigen complex displayed on cell surface C) complement is secreted ? B cell contacts antigen ? helper T cell activated ? cytokines released D) cytotoxic T cells ? class II MHC molecule-antigen complex displayed ? cytokines released ? cell lysis