Question 1
Some bacterial transposons, known as Tn elements, are larger than insertion sequences (IS elements) and contain protein-coding genes that have human health significance. What might such a bacterial transposon contain?
◦ pseudogene
◦ dissociation element
◦ proto-oncogene
◦ drug resistance
◦ oncogene
Question 2
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?
◦
Ds moves only if
Ac is present in the genome;
Ac is capable of autonomous movement.
◦ The movement of
Ac is dependent on two forms of
Ds.
◦ Both elements can move only within chromosome 9.
◦
Ds causes a deletion next to the insertion site of
Ac.
◦
Ac causes a deletion next to the insertion site of
Ds.
Genetic variation in the color of corn kernels
Some organisms used as models in genetic research
Corn
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