Question: QUESTION 1 A Barr body refers to:        a. a sex-linked trait in cats &…

QUESTION 1

A Barr body refers to:
      
a. a sex-linked trait in cats
      
b. a recessive trait in fruit flies
  
c. an inactivated Y chromosome
      
d. spore formation in Neurospora
      
e. None of the answer options is correct.

QUESTION 2

The gap and pair-rule genes affect:

a. only the development of distal parts of fly appendages

b. the number of segments in a fly
      
c.the developmental fates (identities) of the individual
segments
  
d.dorsal-ventral pattern formation.
      
e.the production of posterior morphogens

QUESTION 3

Determining a nucleotide sequence using the Pyrosequencing
technology is dependent upon:

      
a.dideoxy nucleotides being incorporated into a growing DNA
strand
      
b.dideoxy nucleotides terminating the growing DNA strand.
      
c.PPi being incorporated into the growing DNA strand

d.PPi being released from the growing DNA strand
      
e.None of the answer options is correct.

QUESTION 4

Genes that are related by gene-duplication events within the
same genome are called:

      
a.homologs
      
b.orthologs
      
c.paralogs
      
d.heterologs
      
e.alleles

QUESTION 5

When yeast Ty elements were first sequenced and their sequences
compared with all other genes in the database, Ty elements most
closely resembled

      
a.Bacterial IS elements.
      
b.Eukaryotic DNA transposons such as Ds and Ac from maize
      
c.Bacterial viruses such as λαμβδα.
      
d.Retroviruses, such as MoMLV and HIV
      
e.Bacterial composite transposons

QUESTION 6

Bacterial transposons such as Tn3, transpose via a replicative
mechanism involving

      
a.‘cut and paste’ steps.
      
b.a co-integrate intermediate
  
c.double-stranded RNA intermediate.
      
d.single-stranded RNA intermediate
  
e.an RNA-DNA hybrid intermediate.