Chapter 3 - Embryology

Question 1

Parent cells that produces oocytes are called ______.

Answer 1

oogonia

Question 2

During metaphase I, the alignment of paired chromosomes has ______.

Answer 2

some maternal chromosomes on the left side of the equator and some on the right side

Question 3

Which prenatal time period is the longest?

Answer 3

Fetal period

Question 4

The secondary oocyte is surrounded by a layer of cells called the corona ______ and a layer of proteins called the ______ pellucida.

Answer 4

radiata, zona

Question 5

In anaphase I each replicated chromosome contains ______.

Answer 5

two sister chromatids

Question 6

At the end of telophase I, each daughter cell contains ______.

Answer 6

23 replicated chromosomes, each composed of two sister chromatids

Question 7

Oogenesis is the process of _____
development.

Answer 7

oocyte

Question 8

During metaphase I chromosomes line up forming a ______ line of chromosomes.

Answer 8

double

Question 8

When do primary oocytes become secondary oocytes in a female?

Answer 8

When menstrual cycles begin

Question 9

A secondary oocyte is surrounded by a ring of proteins and glycoproteins called the ______.

Answer 9

zona pellucida

Question 10

Which of the following occurs during anaphase I?

Answer 10

Chromosomes are pulled to the opposite ends of the cell.

Question 11

When does the nuclear membrane reform?

Answer 11

Telophase I

Question 12

A zygote is produced by combining the nucleus of an ovum with the nucleus of a

Answer 12

sperm

Question 13

Primary oocytes are arrested in which phase from birth until puberty?

Answer 13

Prophase I

Question 14

The parent cells that produce sperm are called ______.

Answer 14

spermatogonia

Question 15

When does “reduction division” occur?

Answer 15

Anaphase I

Question 16

A zygote is a ______ cell.

Answer 16

single diploid cell

Question 17

When does fertilization usually occur?

Answer 17

Within 12-24 hours after ovulation

Question 18

In fertilization, the male’s sperm and the female’s secondary oocyte unite to form a _____.

Answer 18

zygote

Question 19

Where does fertilization usually occur?

Answer 19

The ampulla of the uterine tube

Question 20

Capacitation prepares the ______, the membranous cap at the head of the sperm, for fertilization.

Answer 20

acrosome

Question 21

A membranous cap filled with digestive enzymes at the head of a sperm is called ______.

Answer 21

an acrosome

Question 22

How many sperm fertilize each egg?

Answer 22

1

Question 23

Sperm penetrate the zona pellucida before or after they penetrate the corona radiata?

Answer 23

after