Meiosis and cytokinesis result in the formation of ________.
A. four haploid cells
B. two diploid cells
C. four diploid cells
D. two haploid cells
A. four haploid cells
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You are interested in a particular gene that you have named LLT (low-light tolerance). What is the frequency of this allele in the population described in question 21.1.1?
A. 0.5 B. 1.0 C. 0.0 D. Need more information
The intertwined mass of hyphae that constitutes the body of a mold is a ________.
A. stem B. stock C. mycelium D. rhizoid E. bud
In the polymerase chain reaction (PCR) the DNA is first heated to break the hydrogen bonds between the two polynucleotide strands, producing two single-stranded molecules that will serve as templates. Which of the following choices would be the second step in PCR?
1.The mixture is cooled and primers bind to complementary DNA regions. 2.Taq polymerase synthesizes a complementary DNA strand for each single-stranded molecule. 3.The mixture is heated and primers bind to complementary DNA regions. 4.The DNA is cut into fragments with a restriction enzyme. 5.The DNA is stained.
The net reproduction per individual per unit time (r)
is __________ per mouse per month in a population of 1,000 mice where 500 mice are born and 400 mice die monthly. a. 0.1 b. 0.2 c. 0.3 d. 0.4 e. 0.5