Exam 13: DNA Technology

The DNA for the normal hemoglobin allele and the mutant sickle-cell allele are cut with the same restriction enzyme,DdeI.The resulting DNA fragments are separated by gel electrophoresis,producing the gel shown in the following figure.Why are the patterns produced by these two alleles different?

Bacteria are the most common host cells for DNA cloning because they reproduce rapidly and create many copies of the recombinant plasmid.

In research,restriction enzymes are used to

Cloning is useful because it

Genetic engineering has been used to mass produce insulin for diabetics.

Gene therapy is described in the Biology in the News article as creating "microscopic factories" that produce missing enzymes or proteins.What provides the instructions to these microscopic factories?

In reproductive cloning of mammals,if the egg cell is not enucleated before being fused to the donated somatic cell,the embryo will develop normally,but it will have two genetic parents.

DNA polymerase is used in the laboratory to

Genetically modified foods

Parkinson's disease,a devastating neurological disorder marked by uncontrollable body movements,may be treated with stem cell therapy and ________ medicine in the future.

The use of genetic engineering has social,economic,and ecological implications.

The least controversial source of human pluripotent stem cells is from

Seventy-five percent of processed foods found in U.S.grocery stores may contain ingredients from genetically engineered plants.

Crops genetically engineered to be resistant to an herbicide might promote an increased use of that herbicide because

Unipotent stem cells can generate all the cells of the organ of their origin.

The induction of pluripotent stem cells requires that specific gene or proteins be added to a differentiated cell.

When the FBI investigates crimes with DNA evidence,they compare 13 different noncoding regions of the human genome between the DNA evidence and the suspect.Why is it important to look at so many regions?

RNA interference would be most useful as a treatment in which of the following scenarios?

Which of the following is NOT involved in creating recombinant DNA?

Human males continuously produce sperm and remain fertile throughout their lives;this ability is most likely the result of