Chronic myelogenous leukemia is correlated with the presence of the Philadelphia chromosome in lymphocyes.  The Philadelphia chromosome is the result of reciprocal translocation between chromosome 9 and chromosome 22.  Which of the following statements correctly describes the role of the Philadelphia chromosome in cancer?

(                                 ) favors Individuals with intermediate traits.  The extremes of a phenotype distribution is selected against. 

The BLAST search program begins with a particular short sequence and 

By binding to an enhancer, an activator can interact with (                                ) nearby the core promoter of a eukaryotic gene to covalently modify histones, thereby promoting the formation of the preinitiation complex.  

Steriod hormones act as effector molecules for transcription activators.  Which of the following is NOT involved in the mechanism by which steroid hormones regulate gene expression?

Which is the proper order of the following steps in a gene-cloning experiments involving vectors? Add DNA ligase. Incubate the chromosomal DNA and the vector DNA with a restriction enzyme. Introduce the DNA into living cells. Mix the digested chromosomal DNA and vector DNA together.

The swing bands were affected greatly by:

For each of the following relationships, correlation coefficient for human fingerprints were determined for 15 pairs of individuals. Father-son: 0.48 Brother-brother: 0.50 Sister-sister (fraternal twins): 0.49 Sister-sister (identical twins): 0.95 What is the average heritability for this trait in this group?

In ancient Rome, portraiture is often intended as a means of keeping the deceased alive in memory.

Which of the following mutations would cause the most deleterious (harmful) phenotypic consequence?