Which of the following is an example of epigenetic inheritance?
A. Expression of the Igf-2 gene based on methylation of the ICR and DMR regions
B. Inheritance of flower color as studied by Mendel
C. Leaf coloration based on mitochondrial inheritance
D. Snail shell twist patterns
A
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Why does DNA pol I carry the number one?
A. It was the first polymerase isolated from E. coli. B. It is the first polymerase to be activated during DNA replication. C. It is the only polymerase that has both 3' to 5' and 5' to 3' exonuclease activity. D. It is the smallest polymerase.
Once inside the host cell, phage DNA
A. is replicated. B. is transcribed. C. may get degraded by bacterial nucleases. D. All of the choices are correct.
If you compared two samples of DNA at three different locations in the genome and found they had different lengths of short tandem repeats at each location, what could you conclude?
A) The two samples came from the same individual. B) The two samples came from females. C) The two samples came from males. D) The two samples came from different individuals.
The direct Coombs' test is designed to detect when people have a disease that causes them to
a. have an excessively high fever. b. quit making antibodies. c. make too many red blood cells. d. produce antibodies that bind to their own red blood cells.