Under what circumstances would a molecular geneticist need to use a bacterial artificial chromosome (BAC)?
A. when cloning small, prokaryotic genomes
B. when cloning small, eukaryotic genomes
C. when cloning large, eukaryotic genomes
D. when the DNA inserts to be used for cloning are very small
E. when sequencing small proteins
C. when cloning large, eukaryotic genomes
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The mechanism for reactive oxygen species to cause mutation is
A. bases are oxidized to a variety of different products which might pair with a different base than the original base would have B. thymine bases are dimerized which causes a break in the DNA which is not repaired correctly. C. the reactive oxygen species stabilize different tautomeric forms of the bases causing inappropriate pairing. D. guanine is depurinated by the reactive oxygen species and if it is not repaired can result in any base being inserted.
During inhalation
a. the pressure in the thoracic cavity is greater than the pressure within the lungs. b. the pressure in the alveoli is less than the atmospheric pressure. c. the diaphragm moves upward and becomes more concave. d. the chest cavity volume decreases. e. all of these occur.
Which of the following statements is true?
A) Sex determination in fruit flies depends on the X : autosome ratio. B) Mammalian sex determination can be influenced by temperature. C) Mammals experience random Y inactivation. D) The testis-determining factor gene is X-linked. E) Dosage compensation occurs in the same way in most animals.
A typical XX human female has one Barr body
Indicate whether the statement is true or false