A type of isolating mechanism that leads to reproductive isolation after a hybrid zygote has formed is called a _____________ isolating mechanism.  

A.  hybridization
B.  postzygotic
C.  prezygotic
D.  adaptive
E.  differential


B.  postzygotic

Biology & Microbiology

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Anticipation is associated with which type of mutation?

A. Nonsense mutations B. Up-promoter mutations C. Intergenic suppressors D. TNRE mutations E. None of the answers are correct

Biology & Microbiology

You read about a drug designed to release more dopamine from the synaptic terminals of certain brain neurons. Based on the drug's description, you know it was designed to fix synaptic function and thus alleviate

A. epilepsy. B. insomnia. C. Alzheimer's disease. D. Huntington's disease. E. Parkinson's disease.

Biology & Microbiology

The distribution of cytoplasm to daughter cells is accomplished during

A) mitosis B) meiosis C) cytokinesis D) karyokinesis

Biology & Microbiology

You wish to produce a human enzyme, protein A, by introducing its gene into bacteria. The genetically engineered bacteria make large amounts of protein A, but it is in the form of an insoluble aggregate with no enzymatic activity

Which of the following procedures might help you to obtain soluble, enzymatically active protein? Select all options that may be useful. Explain your reasoning. A. Make the bacteria synthesize protein A in smaller amounts. B. Dissolve the protein aggregate in urea, then dilute the solution and gradually remove the urea. C. Treat the insoluble aggregate with a protease. D. Make the bacteria overproduce chaperone proteins in addition to protein A. E. Heat the protein aggregate to denature all proteins, then cool the mixture.

Biology & Microbiology