Biology Quiz

Question 1
2 out of 2 points

Which of the following statements about meiosis is true?

Selected Answer:
a.
The chromosome number in the resulting cells is halved.

Question 2
2 out of 2 points

The mitotic spindle

Selected Answer:
e.
is composed of two different types of microtubules.

Question 3
2 out of 2 points

A chromatid is

Selected Answer:
e.
one-half of a newly replicated eukaryotic chromosome.

Question 4
2 out of 2 points

Imagine that there is a mutation in the cyclin gene such that its gene product is nonfunctional. What kind of effect would this mutation have on a skin cell in the area of a cut?

Selected Answer:
a.
The cell would be unable to reproduce itself.

Question 5
2 out of 2 points

In meiosis, as opposed to mitosis,

Selected Answer:
e.
pairing of homologous chromosomes occurs.

Question 6
2 out of 2 points

Which of the following statements about DNA replication and cytokinesis in Escherichia coli is true?

Selected Answer:
c.
Cell reproduction is initiated by reproductive signals, which lead to DNA replication, DNA segregation, and cytokinesis.

Question 7
2 out of 2 points

The difference between asexual and sexual reproduction is that

Selected Answer:
e.
asexual reproduction results in an organism that is identical to the parent, whereas sexual reproduction results in an organism that is not identical to either parent.

Question 8
0 out of 2 points

Which of the following statements about chiasmata is true?

Selected Answer:
a.
They are sites where nonsister chromatids can exchange genetic material during meiosis and increase genetic variation in gametes.

Question 9
2 out of 2 points

Homologous chromosomes undergo crossing over during

Selected Answer:
d.
prophase I of meiosis.

Question 10
0 out of 2