AnswersBiology_A_ICMitosis

Week 7 Test Answers

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1
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Which correctly describes crossing over?

A
the process whereby non-sister chromatids exchange genetic material
B
the process whereby homologous chromosomes are pulled to opposite poles of the cell
C
the process whereby sister chromatids are pulled to opposite poles of the cell
D
the process whereby homologous chromosome pairs align randomly along the metaphase plate
2
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It is crucial that the process of mitosis is error free. This is because otherwise healthy cells can

A
grow into giant super cells.
B
undergo meiosis.
C
become cancer cells.
D
produce two identical cells.
3

How do environmental factors influence genetic traits?a.Environmental factors determine all genetic traits.b.Environmental factors can determine if a genetic trait becomes a health issue.c.Environmental factors are determined by genetic traits.d.Environmental factors have no influence on genetic traits.

A
A
B
B
C
C
D
D
4

Heredity has an impact on personal health, but environmental factors are important as well.

A
T
B
F
5

The illustration below shows the steps of meiosis I. What is the step that is labeled D?

Question illustration
A
metaphase I
B
metaphase II
C
telophase II
D
telophase I
6

The diagram shows a phase of mitosis.Which does the letter A represent in the diagram?

Question illustration
A
centriole
B
chromosome
C
centromere
D
spindle
7

Which can be a genetic disease that requires control of insulin levels?

A
cancer
B
color blindness
C
sickle cell anemia
D
diabetes
8

Carlos and Veronica lead very similar lifestyles. They both run every day and eat healthily, but they both have smoked since they were 16. Carlos was diagnosed with lung cancer when he was 48, but Veronica never got cancer.Which most likely explains why Carlos got cancer but Veronica did not?

A
Veronica leads a healthier lifestyle than Carlos.
B
Carlos has a gene for cancer that was triggered.
C
Veronica has a gene for cancer that Carlos does not.
D
Carlos leads a healthier lifestyle than Veronica.
9

How has the study of mitosis affected scientists’ knowledge of cancer?

A
It led to a study of how to induce cancer cells to divide more rapidly.
B
It led to an understanding of how cancer cells divide so rapidly.
C
It led to the development of contact-inhibition regulators.
D
It led to the discovery of how to prevent cancer cells from dividing.
10

How does interphase prepare cells for mitosis?

A
rest prior to cell division
B
growth of cell and replication of DNA
C
dissolution of nucleus and cell membrane
D
division of cytoplasm
11

A river has a large amount of algae growing. Which most likely caused the growth?

A
dirt
B
bacteria
C
fertilizer
D
trash
12

What is the end result of meiosis?

A
four identical daughter cells
B
four different daughter cells
C
two identical daughter cells
D
two different daughter cells
13

A picture of a patient’s lung showed it to be shriveled and darker than usual.Which is most likely the cause of this lung condition?

A
smoking
B
overeating
C
sickle cell anemia
D
poor refrigeration
14

Meiosis occurs in a series of different phases and creates genetically unique reproductive cells. Which process helps make meiotic cells genetically different and occurs during prophase I, but not during prophase II?

A
fertilization
B
independent assortment
C
crossing over
D
chromosome replication
15

People are less likely to have certain bacterial infections now than they were 100 years ago.Which two practices have been developed more and more over time and have reduced cases of bacterial infection?

A
refrigeration and trash collection
B
trash collection and lichen use
C
lichen use and dieting
D
dieting and refrigeration
16

Which has allowed humans to decrease the amount of salt they use in stored foods?

A
lichens
B
refrigeration
C
trash collection
D
treatment plants
17

The diagram illustrates one method of genetic recombination.Which method of genetic recombination is illustrated in the diagram?

Question illustration
A
crossing over
B
independent assortment
C
fertilization
D
tetrad formation
18

Which consist of sperm cells and egg cells?

A
gametes
B
tetrads
C
diploids
D
chromosomes
19

Scientists use tissue cultures to study possible medicines that can be used to treat cancer patients. What is one benefit of this procedure?

A
Patients do not receive harmful or ineffective medication.
B
The cultured cells are not in their normal environment.
C
Doctors know how to treat all types of cancer.
D
One tissue culture can be used for all cancer patients.
20

Which best illustrates how Gregor Mendel used creativity that lead to scientific discovery?

A
He noticed that traits were passed on from parents to offspring.
B
He chose a parent generation and carefully studied its traits.
C
He used pea plants to study the patterns of heredity.
D
He observed how specific traits were passed from parent to offspring.

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