1. Which is closest to the number of protein coding genes across all of the chromosomes in a
human body cell, as determined by the HGP?
a. About 30 thousand
2. Most of the DNA in a human cell codes for protein.
a. False
3. Which is true of restriction enzymes?
a. They cut specific sequences of DNA nucleotides
4. What natural process is mimicked in the lab when we use the PCR technique?
a. Replication of DNA
5. Into what structures can we place genes so that bacteria will then produce human proteins?
a. Plasmids
6. Golden rice has been genetically engineered. What is special about it?
a. It contains high levels of certain vitamins
7. BT corn have been genetically engineered. What is special about them?
a. It produces its own insect killing chemicals
8. If two healthy carriers of a recessive genetic disease visit a genetic counselor, what will that
person tell them about the chances that they will produce an unhealthy child?
a. Their chances are 1 in 4
9. If a mother who is heterozygous and a father who is homozygous recessive, what are their
chances that they will produce an unhealthy child?
a. Their chances are 2 in 4
10. What is the number of haploid chromosomes you would expect to find in a normal human?
a. 23
11. What is the diploid number of chromosomes you would expect to find in a normal human?
a. 46
12. Which disorder is associated with the trisomy of chromosome 21?
a. Down syndrome
13. Which of the following techniques would be most helpful in diagnosing a genetic disease as
soon as possible after fertilization?
a. Blastomere analysis
14. What vectors are being explored for the efficiency with which they can deliver DNA into
defective human cells for the gene therapy?
a. Viruses
15. With more research, which kind of gene therapy might result in a cure that extends to the
children of a treated person?
a. Therapy of the person as a fertilized egg
16. Which is the most accurate as the definition of a stem cell?
a. A cell that has the potential to develop into any other kind of cell
17. Which of the following best describes the process of stem cell formation?
a. Totipotent cells produce pluripotent cells that produce committed cells
18. Based on ethical concerns, which did president Bush decide about research on human
embryonic stem cells in the United States?
