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WorksheetsEdgenuity Unit 2 Exam
Total questions: 30
Worksheet time: 45mins
A gardener wants to grow plants with large purple flowers. She crosses two parent plants that have large purple flowers in order to produce the desired trait in the offspring. Which best describes this scenario?
genetic engineering
gene therapy
cloning
selective breeding
Janelle thinks that genetic engineering could be used to make a larger fruit rather than cloning the fruit. Which would best support her point of view?
Genetic engineering does not cost as much.
Genetic engineering does not result in genetically identical organisms.
Genetically engineered foods never cause allergies in people.
Genetically engineered foods have not been modified.
Bipalium kewense is a species of flatworm that can reproduce sexually; however, instead it usually breaks into two pieces, each of which becomes a fully functioning adult.
What is the main method of reproduction for these flatworms?
binary fission
fragmentation
sporulation
fertilization
A teacher makes a Venn diagram to compare asexual reproduction and sexual reproduction. Which label belongs in the region marked X?
Produces offspring
Involves meiosis
Requires spores
Requires eggs
This cell is undergoing a step of meiosis I. What step is the cell in?
the beginning of prophase I
the middle of metaphase I
the end of anaphase I
the middle of telophase I
Snails have a diploid chromosome number of 22. After meiosis, the snail’s sperm or egg would have 11 chromosomes. How many chromosomes would the zygote have after fertilization?
11
22
33
46
Which image represents cytokinesis in a plant cell?
Examine the images of a plant cell in the different stages of mitosis. Which lists the steps in the correct order?
W, X, Y, Z
W, Z, X, Y
Z, W, Y, X
Z, Y, W, X
A DNA sequence is shown. AAT - CCG - GTG
Which sequence best shows the result of a substitution mutation in the DNA?
AAT - CCG - GTG
AAT - CCA - GTG
AAT - CCA - GTG
AAT - CAC - AGT - G
A person with a bacterial infection is taking amoxicillin, which is an antibiotic. The bacteria that are causing the infection have mutated and fight off the amoxicillin. Which best summarizes this mutation?
It is beneficial to the person and harmful to the bacteria.
It is harmful to the person and beneficial to the bacteria.
It is beneficial to the person and to the bacteria.
It is harmful to the person and to the bacteria.
The diagram shows a section of DNA. What is the arrow labeled X pointing to?
adenine
cytosine
guanine
thymine
Which occurs during both DNA replication and protein production?
RNA leaves the nucleus.
DNA leaves the nucleus.
DNA unzips.
RNA unzips.
A scientist takes a cell from one cow and an egg from a second cow. The scientist removes the DNA from the egg and replaces it with the DNA from the first cow. The scientist’s goal is to produce a baby cow with DNA that is identical to the first cow. Which best describes this scenario?
genetic engineering
genetic engineering
cloning
selective breeding
A researcher changes the DNA in a soybean plant so that it produces offspring with a resistance to weed killer. Which best describes this scenario?
genetic engineering
gene therapy
cloning
selective breeding
Which best compares genetic engineering and cloning of animals?
Both result in offspring with a single, specific desirable trait.
Both result in offspring that are genetically identical to the original organism.
Both require that DNA be manipulated in some way.
Both require that only females are used in the process.
The diagram shows a process used to produce apple trees with the desired trait of sweeter fruits. Which labels should be used to complete the diagram?
X: Enzymes
Y: Apple tree DNA
X: Enzymes
Y: Gene for sweeter fruit
X: Apple tree DNA
Y: Gene for sweeter fruit
X: Gene for sweeter fruit
Y: Apple tree DNA
In recent years, a certain area of the world has experienced greater shifts in weather patterns. For example, there are many nights during which the temperature gets below freezing, but many days that are very warm. These shifts have made it difficult to grow and harvest crops. Which advantage of genetic technology would be most helpful in solving this problem?
increased nutritional value of crops
increased resistance to environmental factors
greater resistance to crop-killing diseases
greater resistance to insecticides
Which DNA nitrogen base sequence is the partner of T-C-A-G-C-A?
A-C-G-A-C-T
C-A-G-A-T-G
A-G-T-C-G-T
T-C-A-G-C-A
Which structure carries instructions for producing the proteins that help make a person’s hair curly?
phosphate
deoxyribose
lipid
gene
Shira listed the steps for protein production in cells. Which step is missing?
1. A strand of RNA is made.
2. RNA leaves the nucleus.
3. RNA moves to the ribosome.
4. A protein is made.
DNA unzips after step 1.
DNA unzips before step 1.
DNA is replicated after step 3.
DNA is replicated before step 3.
A DNA sequence is shown.
CTG - GAG - CAT
Which sequences show the result of an insertion mutation in the DNA? Choose 2
CTG - GGC - AT
CTG - TAT - CAT
TTG - GAG - CAT
CTA - GGA - GCA - T
CTG - GAG - TCG - AT
Rosa drew a diagram to compare substitution mutations and insertion mutations. Which label belongs in the area marked "Y"?
may change the type of amino acid
decreases the number of bases in the sequence
never changes the type of amino acid
increases the number of bases in the sequence
A mutation causes a tomato plant to have much fewer, smaller leaves. Plants use their leaves to make food. Which best describes this mutation?
It is harmful because it obviously affects the plant’s ability to survive.
It is beneficial because it affects the plant’s physical appearance.
It is neutral because it does not obviously affect the plant’s ability to survive.
It is neutral because it affects the plant’s physical appearance.
Examine the diagram of the cell cycle.
Which label identifies the stage in which the DNA is copied and the cell grows?
W
X
Y
Z
Examine the diagram of the cell cycle. Which label identifies the step labeled W?
Anaphase: chromosomes thicken
Metaphase: chromosomes thicken
Anaphase: chromosomes are pulled apart
Metaphase: chromosomes are pulled apart
Which statements describe differences between metaphase I and metaphase II? Select two options.
Chromosomes line up in the middle in metaphase I only.
Chromosomes condense in metaphase I only.
A cell has half the number of chromosomes in metaphase II.
There are twice the number of cells in metaphase II.
Spindle fibers exist in metaphase II only.
A female blue jay is generating an egg cell for reproduction. Through which process does the egg cell form?
meiosis
prophase
fertilization
mitosis
Which stage of the cell cycle involves cell growth and DNA replication?
mitosis
cytokinesis
interphase
prophase
Which statement describes a similarity between asexual reproduction and sexual reproduction?
Both processes involve fertilization.
Both processes involve cell division.
Both processes produce genetically identical offspring.
Both processes require two parents.
Chimpanzees reproduce sexually, and sponges reproduce asexually. What disadvantage do chimpanzees have compared to sponges?
Chimpanzees’ offspring have differences in their DNA.
Chimpanzees require less energy to make offspring.
Chimpanzees reproduce more slowly.
Chimpanzees’ offspring have to fight harder for resources.
