DNA methylation and histone acetylation are examples of _____
A) genetic mutation
B) chromosomal rearrangements
C) karyotypes
D) epigenetic phenomena
E) translocation
Answer: D
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Colonies growing on modified cefsulodin-irgasan-novobiocin (CIN) agar appear to be either Aeromonas spp. or Yersinia enterocolitica. Which test should be performed to differentiate be-tween these two organisms?
a. String test b. Sucrose fermentation c. Glucose fermentation d. Oxidase
Barbara McClintock discovered mobile elements in corn by analyzing the genetic behavior of two elements, Ds and Ac. The interplay between these two elements has become one of the most interesting stories of discovery in the field of genetics
How do Ds and Ac interact? A) Both elements can move only within chromosome 9. B) Ds causes a deletion next to the insertion site of Ac. C) Ac causes a deletion next to the insertion site of Ds. D) The movement of Ac is dependent on two forms of Ds. E) Ds moves only if Ac is present in the genome; Ac is capable of autonomous movement.
In precipitation tests, the antigen
A. -antibody complex settles to the bottom of the tube. B. is a whole cell. C. is a soluble molecule. D. is an insoluble molecule.
Hemophilia is a genetic disease that has plagued the royal houses of Europe. The disease allele is recessive and X-linked. Queen Victoria was a carrier, and her granddaughter Alexandra married Nicholas II, the last czar of imperial Russia
Alexandra was a carrier for hemophilia; Nicholas was normal. Their son, Alexis, was afflicted with the disease. Alexis and his four sisters were killed in 1917. What genetic traits were possible for the four sisters? A) None of the four sisters carried the hemophilia allele. B) At least one of the sisters was a carrier of the allele. C) All four sisters were carriers of the hemophilia allele. D) At least one of the sisters had hemophilia like Alexis.