An individual that has two dominant alleles for a trait (AA) is called __________.
Fill in the blank(s) with the appropriate word(s).
homozygous dominant
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In studying an E. coli strain containing a known frameshift mutation, you isolate a mutant in which this frameshift is suppressed. You therefore expect to find which of the following associated with the suppression? (Assume the frameshift has not been corrected in the coding for the peptide.)
A) suppressor tRNAs encode an amino acid for a stop signal B) suppressor tRNAs encode a four-nucleotide anticodon C) suppressor tRNAs encode a two-nucleotide anticodon D) both choices B and C E) all of the above
Biological magnification can be defined as the:
a. concentration of a chemical in organisms increasing as the pollutant moves up a food chain b. energy transfer increasing as it moves up a food chain c. fixation of nutrients from the atmosphere d. entrance into the biological portion of a biogeochemical cycle e. increase in food web members in biologically diverse ecosystems
Genetic information carried by a(n) __________ directs the synthesis of a __________ chain during
translation. Fill in the blank(s) with the appropriate word(s).
Clusters of Hox genes are found in
a. flies and frogs only b. flies only c. plants only d. nearly all animals