Walden PUBH6170 quiz 4

27 Jun Walden PUBH6170 quiz 4

Question
Question 1
A couple has a daughter who is color-blind. The mother is not color-blind, but the father is. What is the genotype of the mother for this trait?
Answer

two dominant alleles

one dominant allele, one recessive allele

three dominant alleles

one abnormal Y chromosome, one normal X chromosome

two recessive alleles
1 points

Question 2
Pharmaceutical companies prefer to genetically engineer large animals with human genes because it may be possible to obtain large amounts of the resulting protein from the animals’:
Answer

milk.

fur.

blood.

meat.

bones.
1 points

Question 3
Which of the following is not true regarding Tay-Sachs disease?
Answer

This disease is caused by a dominant-lethal allele.

Tay-Sachs disease is fairly common among Ashkenazi Jews of Central European descent.

Carriers of this disease do not have any symptoms of the disease.

Genetic tests are available to determine if an individual is a carrier of the disorder.

Symptoms of the disease result from an enzyme deficiency.
1 points

Question 4
Vaccines produced by genetically engineered bacteria contain the antigen(s) of the disease-causing organism, not the organism itself.
Answer
True

False

1 points

Question 5
Which of the following is a problem associated with traditional vaccines as opposed to vaccines produced by transgenic organisms?
Answer

Traditional vaccines are always in short supply.

Traditional vaccines may result in disease symptoms because they contain killed or weakened organisms.

Traditional vaccines can only be given after infection; they cannot prevent infection.

Traditional vaccines must be given in larger quantity.

Traditional vaccines are more expensive.
1 points

Question 6
Prior to genetic engineering, insulin for humans with insulin-dependent diabetes was extracted from pigs and cattle. Presently insulin is produced by transgenic:
Answer

humans.

chickens.

viruses.

bacteria.

monkeys.
1 points

Question 7
Alleles are alternative versions of chromosomes.
Answer
True

False

1 points

Question 8
Plasmids are useful to scientists involved in recombinant DNA technology because foreign genes can be inserted into the plasmids and then the plasmids can be inserted back into bacteria.
Answer
True

False

1 points

Question 9
Once a genetic disorder in an adult is treated successfully through gene therapy, it is highly unlikely that the person’s children will inherit the gene(s) for the disease.
Answer
True

False

1 points

Question 10
Which of the following human traits is an example of codominance?
Answer

sickle-cell anemia

variation in eye color

human height

AB blood type

both A and D
1 points

Question 11
An example of a genotype is
Answer

attached earlobes.

homozygous dominant.

brown hair color.

long fingers.

blood type AB
1 points

Question 12
What is the significance of crossing-over, independent assortment, and random fertilization?
Answer

an increase in the number of gametes produced by an individual, thereby increasing the chance that fertilization will occur

an increase in the genetic diversity of gametes and zygotes

an increase in the number of daughter cells produced by mitosis, thus providing a mechanism for rapidly repairing injured tissues

a decrease in the genetic complexity of living systems, making it more likely that a species will survive

a decrease in the amount of time it takes to produce gametes
1 points

Question 13
Bacteria are very important to the genetic engineering industry because:
Answer

they reproduce very quickly.

they are identical in structure to viruses which are often used as vectors.

they cannot become transgenic organisms.

they readily take up plasmids containing foreign genes.

A and D
1 points

Question 14
Manipulation of the genetic makeup of cells or whole organisms is known as
Answer

genetic analysis

DNA splicing

molecular biology

genetic engineering

none of the above
1 points

Question 15
During DNA replication, a _____added to DNA template serves as the beginning site of nucleotide addition.
Answer

DNA polymerase

5′ OH end of sugar group

3′ OH end of sugar group

primer

poly A tail