In a tetanus shot, patients are injected with small amounts of tetanospasmin, a toxin produced by the Clostridium tetani, the bacterium that causes tetanus. The gene for this protein is carried on a plasmid in the bacterium. Which of the following is true of this gene?
a. It is part of the Clostridium tetani chromosome
b. It cannot go through horizontal gene transfer
c. It can enter another bacterium by transformation
d. It cannot go through vertical gene transfer
e. It is found in the nucleus of the Clostridium tetani
Answer: c. It can enter another bacterium by transformation
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Answer the following statement true (T) or false (F)
Colchicine is a drug that is used in plant breeding to create polyploids. It blocks the assembly of microtubules. If dividing cells are treated with Colchicine, at what stage of mitosis would you predict the arrest would occur?
A. prophase B. metaphase C. late Anaphase D. telophase E. G1 of interphase
Homozygotes for hemoglobin C have
A) sickle cell disease. B) a normal phenotype. C) a bluish complexion. D) a black mouth.
What error of meiosis leads to both a duplication and a deletion?
A) unequal crossing over B) X-ray chromosomal breakage C) replication cross formation D) replication errors E) D loop formation