AnswersQ5 Biology 2014Lab: Blood Typing

The Reproductive Process Answers

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1
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During the development of human offspring, which of the following begins to hear and see?

A
fetus
B
embryo
C
blastocyst
D
zygote
2
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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
3

What is one difference between a primary oocyte and a secondary oocyte in humans?

A
A primary oocyte contains 46 chromosomes, while a secondary oocyte contains 23 chromosomes.
B
A primary oocyte is produced after birth, while a secondary oocyte is produced before birth.
C
A primary oocyte develops in both men and women, while a secondary oocyte develops only in women.
D
A primary oocyte is the product of meiosis, while a secondary oocyte is the product of mitosis.
4

In the United States, alcoholic beverages that are sold in stores display a government warning stating that pregnant women should not drink alcoholic beverages. This is because

A
it prevents cleavage division from occurring, so a zygote cannot become a blastocyst.
B
if a woman drinks alcohol while she is pregnant, she may not be able to ovulate again after childbirth.
C
studies have proven that alcohol consumption causes long-lasting disorders in the fetus.
D
the science of chemistry has shown that alcohol is a reactive substance that may interfere with the mother’s food digestion.
5

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
6

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.
7

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.
8

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.
9

What process occurs as a zygote becomes a blastocyst?

A
meiosis
B
cleavage division
C
fertilization
D
ovulation
10

What happens to a spermatid to change it into a sperm cell?

A
Meiosis occurs, making a cell with n chromosomes.
B
The nuclei of two polar bodies fuse, making a cell with 2n chromosomes.
C
A tail is added, making the sperm a motile cell.
D
A membrane hardens, making the sperm a nonmotile cell.

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