AnswersCA-Life Science B High SchoolThe Reproductive Process

The Reproductive Process Answers

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1
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Which sequence correctly represents the order of events during egg formation?

A
primary oocyte ® secondary oocyte ® meiosis I ® meiosis II ® ovum
B
ovum ® meiosis I ® primary oocyte ® meiosis II ® secondary oocyte
C
primary oocyte ® meiosis I ® secondary oocyte ® meiosis II ® ovum
D
primary oocyte ® meiosis I ® ovum ® meiosis II ® secondary oocyte
2
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What is one difference between oogenesis and spermatogenesis?

A
Oogenesis occurs in females, but spermatogenesis occurs in males.
B
Oogenesis starts at puberty, but spermatogenesis starts before birth.
C
Oogenesis involves mitosis, but spermatogenesis involves meiosis.
D
Oogenesis involves differentiation, but spermatogenesis does not involve any differentiation.
3

Which best describes the relationship of the embryo and the fetus?

A
The embryo and the fetus are both formed when the sperm and egg fuse.
B
The fetus differentiates into the embryo and the placenta.
C
The embryo has more cells than the fetus has.
D
The fetus is more developed than the embryo.
4

When a doctor is able to determine the sex of the fetus during an ultrasound, which stage of development is the fetus in?

A
third trimester
B
blastocyst formation
C
first trimester
D
second trimester
5

Which best describes oogenesis?

A
Oogenesis involves mitosis but not meiosis.
B
Oogenesis differentiates oogonia directly into eggs.
C
Oogenesis starts in development and then halts until puberty.
D
Oogenesis happens in the testes.
6

A medical biologist is examining one of many cells that are produced during the human oogenesis process. The cell is haploid, meaning that it has 23 chromosomes, and it was removed from the body shortly after it entered the fallopian tube. The cell had begun the process of meiosis II, but did not finish it. What type of cell is the biologist most likely examining?

A
a fertilized egg
B
a polar body
C
a primary oocyte
D
a secondary oocyte
7

Which of the following is a part of male gamete formation, but not a part of female gamete formation?

A
testes
B
ovaries
C
germ cells
D
oogonia
8

Drinking alcohol during pregnancy negatively impacts development of the fetus because

A
the mother’s body is unable to process alcohol.
B
alcohol crosses the placental barrier.
C
the mother can no longer produce primary oocytes.
D
alcohol causes the mother to have facial distortions.
9

What process occurs as a zygote becomes a blastocyst?

A
meiosis
B
cleavage division
C
fertilization
D
ovulation
10

The head of a human offspring turns down and prepares to enter the birth canal during

A
the first trimester.
B
the second trimester.
C
the third trimester.
D
birth.

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