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WorksheetsCAPT Genetics
Total questions: 16
Worksheet time: 8mins
Name
Class
Date
1.
Which of the following is NOT a means by which meiosis contributes to the genetic variability of organisms?
a)
Crossing over of homologous chromosomes during meiosis
b)
Random fertilization of egg and sperm cell
c)
Independent assortment of homologous chromosomes during meiosis
d)
Meiosis in body cells throughout an organism.
2.
Cystic fibrosis (CF) is a condition characterized by difficulty in breathing and digestion. CF is caused by a defect in a specific gene. The pedigree diagram below shows the inheritance pattern of cystic fibrosis in two generations of a family. Which couple has a 25% probability of producing offspring who are homozygous for cystic fibrosis?
a)
3 and 4
b)
5 and 6
c)
7 and 8
d)
9 and 10
3.
An individual with CF is not able to transmit the disease by physical contact because _____________.
a)
the gene for the disorder is only carried in the bloodstream
b)
CF is a genetic disorder and can only be passed from parent to offspring
c)
the bacteria that transmit the defective gene must be inherited from a parent
d)
CF is so rare that the probability of coming into contact with an affected individual is low
4.
What type of inheritance pattern is associated with CF?
a)
Incomplete dominance
b)
X-linked (sex-linked) inheritance
c)
Recessive/dominant inheritance
d)
Dihybrid dominant
5.
Two farmers plant different varieties of corn on neighboring farms. Farmer A plants genetically modified corn. Farmer B plants a non-modified variety of corn. What would be farmer B’s primary concern if she plans to gather seed for next year’s crop?
a)
Loss of genetic variability in the non-modified variety
b)
That mutation rates will increase in the non-modified variety
c)
That insects will only pollinate the genetically modified corn
d)
Unintended transfer of modified genes to her crop by cross-pollination
6.
When did a major extinction event most likely occur?
a)
At the end of the Cenozoic
b)
At the end of the Permian
c)
At the beginning of the Silurian
d)
At the beginning of the Cambriam
7.
According to the records of fossil species V and W, which statement is most likely true?
a)
Fossil species W appeared before fossil species V, allowing fossil species W to survive longer.
b)
Fossil species W was ancestral to fossil species V because it appeared before fossil species V.
c)
Fossil species W had greater genetic variability than fossil species V, allowing fossil species W to adapt and survive longer.
d)
Fossil species W had lower reproductive success than fossil species V, allowing smaller populations to adapt and survive.
8.
Vestigial structures, such as hip bones in whales and appendixes in humans, are those that have little or no function for the organism. What is the most likely reason for this loss of function over time?
a)
The organism is undergoing speciation.
b)
The organism is experiencing a high mutation rate.
c)
The structure was over utilized by the organism.
d)
The structure was not highly beneficial to the organism.
9.
Which of the following is a structural adaptation that would least likely help frogs survive in a pond?
a)
Larger webbing on the feet
b)
Increased strength of leg muscles
c)
Increased green color on the back of the frog
d)
Increased white color on the back of the frog
10.
Blight is a plant disease caused by a fungus that affects potato plants. Some wild breeds of potato have natural resistance to the fungus. These wild potatoes contain chemical compounds that cause them to taste bad. Scientists are trying to produce potato plants that are resistant to blight but still produce potatoes that taste good. The development of a blight-resistant potato breed might be good for the environment because the new potato breed will need____________.
a)
less water
b)
less fertilizer
c)
less fungicide
d)
less field space
11.
It is very difficult to develop a vaccine against the common cold. The reason for this is that the common cold virus____________.
a)
hides in the digestive system.
b)
changes rapidly due to high mutation rates.
c)
includes RNA as its genetic material
d)
is too small for the immune system to detect.
12.
What is accomplished by treating a person who has a bacterial infection with antibiotics?
a)
Immune to future infections
b)
Weakening of the person's immune system
c)
Reduction in the duration and intensity of the infection
d)
Modification of bacterial DNA to make the bacteria harmless
13.
A scientist conducted a study of an organism and found that its body cells contained 40 chromosomes. These cells were cultured in the laboratory, and cell division was observed. What difference, if any, would the scientist expect to observe between body cell division and sex cell division in the organism?
a)
Body cells divide by mitosis, and sex cells divide by meiosis.
b)
Body cells divide by meiosis, and sex cells divide by mitosis.
c)
There is no difference; body cells and sex cells both divide by mitosis.
d)
There is no difference; body cells and sex cells both divide by meiosis.
14.
The graphs show the annual number of AIDS deaths in the United States and in South Africa from 1999–2003. What conclusion is best supported by the data in the graphs?
a)
AIDS has been cured in the United States but not in South Africa.
b)
AIDS has caused a greater population decline in South Africa than it has in the United States.
c)
The number of AIDS deaths in each country is solely responsible for the population growth rate in each country.
d)
The population in South Africa has increased regardless of AIDS, whereas the United States population has decreased as a result of AIDS.
15.
Which of the following does not represent a process by which the genetic information of a specific organism is modified?
a)
Mutations
b)
Recombinant DNA Technology
c)
Selective Breeding
d)
Genetic Engineering
16.
Which of the following would not be used as an argument to label genetically modified foods?
a)
The costs of additional labeling.
b)
The rights of individuals to know what they are consuming.
c)
Preventing allergic reactions to food.
d)
Genetically modified foods may be unsafe.
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