Question 1

Select all of the following that describe a homologous pair of chromosomes.

Accepted Answer

-can have different alleles
-same light and dark banding patterns
-same size

Question 2

A single molecule of DNA and its associated proteins form a

Accepted Answer

Chromosome

Question 3

A diploid cell is indicated by what abbreviation?

Accepted Answer

2n

Question 4

Select all the organisms that can produce gametes for sexual reproduction.

Accepted Answer

-ferns
-bread molds
-humans

Question 5

The abbreviation n or 1n represents a _______ cell.

Accepted Answer

Haploid

Question 6

Two chromosomes with the same size, centromere location, and gene sequence are called a(n) _________ pair

Accepted Answer

homologous

Question 7

Located in the ovaries and testes of animals, specialized cells called germ cells are ______ and undergo meiosis to produce ______.

Accepted Answer

diploid; gametes

Question 8

How many rounds of cell division occur in meiosis?

Accepted Answer

2

Question 9

In animals, specialized diploid cells that undergo meiosis are called

Accepted Answer

Germ Cells

Question 10

Select all of the following that are true about meiosis.

Accepted Answer

-produces gametes with half the number of chromosomes as compared to somatic cells
-includes two cell divisions
-creates four haploid cells from one diploid cell

Question 11

Select all of the mechanisms that generate genetic variability in sexual organisms.

Accepted Answer

-Random Fertilization
-Crossing Over
-Random orientation of chromosomes

Question 12

Crossing over is the process in which

Accepted Answer

homologous chromosomes physically exchange pieces.

Question 13

Dividing cells that contain only one chromosome from each homologous pair lined up singly at the equator of the cell must be undergoing:

Accepted Answer

Meiosis II

Question 14

Select all of the following that describe mitosis.

Accepted Answer

-results in 2 daughter cells
-starts with a diploid cell and results in diploid cells

Question 15

What is a cell with a complete extra set of chromosomes called?

Accepted Answer

polyploid

Question 16

Crossing over is the process in which

Accepted Answer

homologous chromosomes physically exchange pieces.

Question 17

Select all of the following that can result from nondisjunction in humans.

Accepted Answer

-failed development due to missing genetic material
-trisomy
-an extra copy of a chromosome

Question 18

What occurs when chromosomes do not separate during meiotic divisions?

Accepted Answer

nondisjunction

Question 19

Nondisjunction of the ______ chromosome during meiosis can produce offspring that are XXX or XXY.

Accepted Answer

X

Question 20

Chromosomal __________ is an abnormality that results in the loss of one or more genes from a chromosome.

Accepted Answer

deletion

Question 21

In human males, specialized cells that are diploid and will enter meiosis I are called

Accepted Answer

primary spermatocytes.

Question 22

Select all of the following that are true about primary spermatocytes.

Accepted Answer

-produced by mitosis of spermatogonium
-will enter meiosis I
-diploid

Question 23

Select all of the following that are true about spermatids.

Accepted Answer

-specialize into mature sperm
-haploid
-equal-sized

Question 24

Select all of the following that are true about primary oocytes.

Accepted Answer

-produced by mitosis
-diploid
-will enter meiosis I

Question 25

In human males, specialized cells that are diploid and will enter meiosis I are called

Accepted Answer

primary spermatocytes.

Question 26

A crossover in meiosis is an exchange of genetic material between.....

Accepted Answer

nonsister chromatids of homologous chromosomes.

Question 27

Crossing over can occur during what phase of meiosis?

Accepted Answer

Prophase I

Question 28

If crossing over occurs between a homologous pair of chromosomes during meiosis, what will be present in the gametes?

Accepted Answer

Some chromatids will have parental combinations of alleles, and some chromatids will be recombinant.

Question 29

Random orientation of homologous chromosomes occurs in ________ of meiosis.

Accepted Answer

Metaphase I

Question 30

What pulls the chromosomes of a homologous pair to opposite poles?

Accepted Answer

Spindle Fibers

Question 31

Centromeres divide in

Accepted Answer

mitosis and meiosis II

Question 32

What describes meiosis II in humans?

Accepted Answer

haploid → haploid

Question 33

Arrange the following events in the proper order in which they occur during meiosis I.

Accepted Answer

1. Synapsis
2. Crossing Over
3. Random orientation along equator of cell
4. Separation of homologous chromosomes

Question 34

What is examples of Haploid Cells?

Accepted Answer

Gamete, Egg Cell, Sperm Cell

Question 35

What are examples of Diploid Cells?

Accepted Answer

Germ Cell, Somatic Cell, Zygote

Question 36

Each daughter cell produced in meiosis has

Accepted Answer

half the number of chromosomes as the parent cell.

Question 37

The number of cells produced in meiosis is

Accepted Answer

twice the number of cells produced in mitosis.

Question 38

What is a correct sequence of cells in spermatogenesis?

Accepted Answer

spermatogonium → primary spermatocyte → secondary spermatocyte

Question 39

Then, in a process called random orientation, homologous chromosomes align _______-file at the center of the cell and then separate.

Accepted Answer

double

Question	Answer
Select all of the following that describe a homologous pair of chromosomes.	-can have different alleles -same light and dark banding patterns -same size
A single molecule of DNA and its associated proteins form a	Chromosome
A diploid cell is indicated by what abbreviation?	2n
Select all the organisms that can produce gametes for sexual reproduction.	-ferns -bread molds -humans
The abbreviation n or 1n represents a _______ cell.	Haploid
Two chromosomes with the same size, centromere location, and gene sequence are called a(n) _________ pair	homologous
Located in the ovaries and testes of animals, specialized cells called germ cells are ______ and undergo meiosis to produce ______.	diploid; gametes
How many rounds of cell division occur in meiosis?	2
In animals, specialized diploid cells that undergo meiosis are called	Germ Cells
Select all of the following that are true about meiosis.	-produces gametes with half the number of chromosomes as compared to somatic cells -includes two cell divisions -creates four haploid cells from one diploid cell
Select all of the mechanisms that generate genetic variability in sexual organisms.	-Random Fertilization -Crossing Over -Random orientation of chromosomes
Crossing over is the process in which	homologous chromosomes physically exchange pieces.
Dividing cells that contain only one chromosome from each homologous pair lined up singly at the equator of the cell must be undergoing:	Meiosis II
Select all of the following that describe mitosis.	-results in 2 daughter cells -starts with a diploid cell and results in diploid cells
What is a cell with a complete extra set of chromosomes called?	polyploid
Crossing over is the process in which	homologous chromosomes physically exchange pieces.
Select all of the following that can result from nondisjunction in humans.	-failed development due to missing genetic material -trisomy -an extra copy of a chromosome
What occurs when chromosomes do not separate during meiotic divisions?	nondisjunction
Nondisjunction of the ______ chromosome during meiosis can produce offspring that are XXX or XXY.	X
Chromosomal __________ is an abnormality that results in the loss of one or more genes from a chromosome.	deletion
In human males, specialized cells that are diploid and will enter meiosis I are called	primary spermatocytes.
Select all of the following that are true about primary spermatocytes.	-produced by mitosis of spermatogonium -will enter meiosis I -diploid
Select all of the following that are true about spermatids.	-specialize into mature sperm -haploid -equal-sized
Select all of the following that are true about primary oocytes.	-produced by mitosis -diploid -will enter meiosis I
In human males, specialized cells that are diploid and will enter meiosis I are called	primary spermatocytes.
A crossover in meiosis is an exchange of genetic material between.....	nonsister chromatids of homologous chromosomes.
Crossing over can occur during what phase of meiosis?	Prophase I
If crossing over occurs between a homologous pair of chromosomes during meiosis, what will be present in the gametes?	Some chromatids will have parental combinations of alleles, and some chromatids will be recombinant.
Random orientation of homologous chromosomes occurs in ________ of meiosis.	Metaphase I
What pulls the chromosomes of a homologous pair to opposite poles?	Spindle Fibers
Centromeres divide in	mitosis and meiosis II
What describes meiosis II in humans?	haploid → haploid
Arrange the following events in the proper order in which they occur during meiosis I.	1. Synapsis 2. Crossing Over 3. Random orientation along equator of cell 4. Separation of homologous chromosomes
What is examples of Haploid Cells?	Gamete, Egg Cell, Sperm Cell
What are examples of Diploid Cells?	Germ Cell, Somatic Cell, Zygote
Each daughter cell produced in meiosis has	half the number of chromosomes as the parent cell.
The number of cells produced in meiosis is	twice the number of cells produced in mitosis.
What is a correct sequence of cells in spermatogenesis?	spermatogonium → primary spermatocyte → secondary spermatocyte
Then, in a process called random orientation, homologous chromosomes align _______-file at the center of the cell and then separate.	double

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Bio Chapter 9