Exam 2

Question 1

The goal of male reproductive system is to store gametes, produce male hormones, and passage for urine

Answer 1

True

Question 2

The testes produce __________.

Answer 2

Testosterone

Question 3

Where do sperm cells mature in the male reproductive tract?

Answer 3

Epididymis

Question 4

Gametes have the the same number of chromosomes as any other cells in the body.

Answer 4

False

Question 5

What animal has a corkscrew shaped penis

Answer 5

Boar

Question 6

Gametes have the same number of chromosomes as any other cells in the body

Answer 6

False

Question 7

______ has testes inside the body.

Answer 7

Rooster

Question 8

Line crossing is a breeding system that results in non-fertile offspring.

Answer 8

False

Question 9

Spermatozoa are developed in the

Answer 9

Testicles

Question 10

The _____ organ in the male produces testosterone?

Answer 10

Testicles

Question 11

Where is semen deposited in a cows reproductive tract during natural mating?

Answer 11

Vagina

Question 12

What is an intact male pig called?

Answer 12

Boar

Question 13

Where is the nucleus located in sperm cells?

Answer 13

Head

Question 14

Transcription is a type of nuclear division which results in germ cells containing one member of each chromosome pair.

Answer 14

False

Question 15

Which livestock species has a vascular penis?

Answer 15

Stallion

Question 16

How many spermatids are yield during meiosis of the primary germ cell?

Answer 16

4

Question 17

When does reproduction begin?

Answer 17

Copulation

Question 18

When does reproduction begin?

Answer 18

Copulation

Question 19

Which selection method uses numerical rating by combining performance traits into a single number?

Answer 19

Selection index

Question 20

Sus scrofa is the scientific name for

Answer 20

Swine

Question 21

What type of mating system does the poultry and rabbit industry use?

Answer 21

Hand Mating

Question 22

Independent culling is a selection method where animals are removed from the herd if they don’t meet a minimum standard.

Answer 22

True

Question 23

Developing breeding stock with high predicted inheritance is the objective of which of the following?

Answer 23

Purebred producer

Question 24

Using two or more breeds in one breeding system with good hybrid vigor is know as

Answer 24

Composite breeding

Question 25

Heritability is amount of __________ expression of a trait transmitted to offspring

Answer 25

Phenotype

Question 26

Tandem selection is the most effective selection method.

Answer 26

False

Question 27

Which of these traits has low heritability and high heterosis?

Answer 27

Reproduction

Question 28

Members of a variety of livestock with related descent and distinguishable characteristics are a

Answer 28

Breed

Question 29

The molecule responsible for inheritance is

Answer 29

DNA

Question 30

Bos indicus is the scientific name for

Answer 30

Brahman

Question 31

_______ only allows specific individuals to mate.

Answer 31

Selection

Question 32

True or False? The genotype of an animal cannot be seen.

Answer 32

True

Question 33

T or F? The phenotype of an animal cannot be measured or seen.

Answer 33

False

Question 34

An animal with recognizable breed traits and known registered ancestors is called _________

Answer 34

Purebred

Question 35

______ is the transmission of genes from parents to offspring

Answer 35

Inheritance

Question 36

A recessive allele can be overpowered by a ______ allele.

Answer 36

Dominant

Question 37

Increased performance of offspring over the average of the parents is called

Answer 37

Heterosis

Question 38

Mating unrelated individuals of the same breed is ______

Answer 38

Line crossing

Question 39

Inbreeding is defined as the mating of closely related individuals. T or F?

Answer 39

True

Question 40

Which mating system requires the least amount of labor, pen/pasture or AI?

Answer 40

Pen or Pasture

Question 41

_____ is defined as the average age of the parents.

Answer 41

Generation interval

Question 42

Name three accessory glands

Answer 42

Seminal vesicles, Cowper gland, Prostate gland

Question 43

Which of these animals is the oldest when it reaches puberty on average? Horse, Pig, Goat or Cattle

Answer 43

Horse

Question 44

Seminiferous tubules are the site of _____ production in the testes.

Answer 44

Sperm

Question 45

An ejaculate contains 5% of fluids from accessory sex glands. T or F?

Answer 45

False. Contains more

Question 46

______ are examples of species crossing.

Answer 46

Beefalo, hinny, mule, and zonkey.

Question 47

What are the three types of penises?

Answer 47

Fibroelastic penis Vascular penis Sigmoid Flexure