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Post-Test
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1
It is now possible to clone a wide variety of vertebrate animals.
A)True
B)False
2
The idea of cloning was first suggested by
A)Wilmut in 1990.
B)Spemann in 1938.
C)Briggs and King in 1952.
D)Gurdon in 1972.
3
Therapeutic cloning involves the addition of a methyl group to some of a gene's cytosine DNA units, thereby locking the genes in the off position.
A)True
B)False
4
Locking genes in the off position involves
A)ionization.
B)hydration.
C)methylation.
D)phosphorylation.
5
Each adult stem cell is capable by itself of developing into a healthy individual and is therefore totipotent.
A)True
B)False
6
The first successful cloning of an adult mammal was of
A)dogs.
B)cats.
C)humans.
D)frogs.
E)sheep.
7
Wilmut's cloning success resulted from surgically combining __________________ and then applying an electrical shock to kick-start the cell cycle.
A)frog cells and sheep cells
B)cat cells and dog cells
C)mammary cells and sperm
D)egg cells and mammary cells
E)sperm and egg cells
8
The procedure used to create Dolly in Wilmut's animal cloning experiment is called therapeutic cloning.
A)True
B)False
9
Therapeutic uses of embryonic stem cells might someday help to cure Parkinson's disease?
A)True
B)False
10
Gene therapy raises serious ethical issues.
A)True
B)False
11
To obtain embryonic stem cells for use in replacing a patient's lost or damaged tissue, the embryo must be destroyed.
A)True
B)False
12
Cloned stem cells are readily accepted by the body as they pass the immune system's ______________ identity check.
A)tissue
B)self
C)species
D)immune
13
Some fear that a cloned embryo might be brought to term if inserted into a human uterus making therapeutic cloning very controversial.
A)True
B)False
14
Gene therapy involves introducing
A)stem cells into the blood.
B)methylated genes into unhealthy genes.
C)healthy genes into cells that lack them.
D)healthy genes into stem cells.
E)All of the above
15
Gene intervention of ___________ is what is meant by gene therapy.
A)sperm cells
B)egg cells
C)both a and b
D)somatic cells
16
The respect-for-person's principle states that
A)in consideration of potential gene therapy, one should carefully weigh the risks vs. benefits.
B)persons affected by the procedure have a right to make their own informed decisions.
C)regardless of the risks, gene therapy should always be considered.
D)the physician treating the person with gene therapy has the right to make decisions if the patient is uninformed.
17
In 1999, the AVV vector successfully cured cystic fibrosis in rhesus monkeys.
A)True
B)False
18
A promising vector in gene therapy is a(an)
A)bacterium.
B)embryonic stem cell.
C)adult stem cell.
D)virus.
E)All of the above
19
There has never been a successful gene therapy treatment in humans.
A)True
B)False
20
Gene intervention of germ-line tissue
A)is only about 50% effective.
B)has proven to be very successful in humans.
C)requires the use of sexually transmitted viruses as vectors.
D)has not yet been attempted in humans.





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