A cell that undergoes meiosis at the time of
fertilization is indicated by
a. A.
b. B.
c. E.
d. A and B.
e. none of these.
Answer: d
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Match the following items with the correct phrases.
_______1. In ____________________, bacteria acquire new genetic information in the form of viral genes. _______2. Oswald Avery and his colleagues discovered that DNA is the hereditary molecule while performing ____________________ experiments with Streptococcus pneumoniae. _______3. In ____________________, bacteria acquire new genetic information as a result of absorbing pieces of naked DNA from their environment. _______4. In ____________________, genetic information is passed from one bacterial cell to another via a hollow sex pilus. _______5. In ____________________, bacteria acquire new genetic information when bacteriophages inject bacterial genes. a. conjugation b. lysogenic conversion c. mutation d. transduction e. transformation
Helicobacter pylori has been implicated as the causal agent of:
a. diarrhea. b. constipation. c. peptic ulcers. d. cardiovascular disease. e. kwashiorkor.
In guinea pigs coat color is determined by a single gene with two alleles. A guinea pig from a true-breeding black strain is mated with a guinea pig from a true-breeding white strain. The F1 progeny are all black. Two of the F1 progeny are mated with each other. What proportion of the F2 progeny is expected to be white?
a. 1/2 b. 1/3 c. 1/4 d. 3/4
In bacteria, what is the function of oxyS?
What will be an ideal response?