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Animal Science > Exam 2 > Flashcards

Exam 2 Flashcards

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Biology 101 flashcards
1
Q

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

A

True

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2
Q

The testes produce __________.

A

Testosterone

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3
Q

Where do sperm cells mature in the male reproductive tract?

A

Epididymis

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4
Q

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

A

False

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5
Q

What animal has a corkscrew shaped penis

A

Boar

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6
Q

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

A

False

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7
Q

______ has testes inside the body.

A

Rooster

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8
Q

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

A

False

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9
Q

Spermatozoa are developed in the

A

Testicles

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10
Q

The _____ organ in the male produces testosterone?

A

Testicles

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11
Q

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

A

Vagina

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12
Q

What is an intact male pig called?

A

Boar

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13
Q

Where is the nucleus located in sperm cells?

A

Head

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14
Q

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

A

False

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15
Q

Which livestock species has a vascular penis?

A

Stallion

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16
Q

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

A

4

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17
Q

When does reproduction begin?

A

Copulation

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18
Q

When does reproduction begin?

A

Copulation

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19
Q

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

A

Selection index

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20
Q

Sus scrofa is the scientific name for

A

Swine

21
Q

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

A

Hand Mating

22
Q

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

A

True

23
Q

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

A

Purebred producer

24
Q

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

A

Composite breeding

25
Q

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

A

Phenotype

26
Q

Tandem selection is the most effective selection method.

A

False

27
Q

Which of these traits has low heritability and high heterosis?

A

Reproduction

28
Q

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

A

Breed

29
Q

The molecule responsible for inheritance is

A

DNA

30
Q

Bos indicus is the scientific name for

A

Brahman

31
Q

_______ only allows specific individuals to mate.

A

Selection

32
Q

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

A

True

33
Q

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

A

False

34
Q

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

A

Purebred

35
Q

______ is the transmission of genes from parents to offspring

A

Inheritance

36
Q

A recessive allele can be overpowered by a ______ allele.

A

Dominant

37
Q

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

A

Heterosis

38
Q

Mating unrelated individuals of the same breed is ______

A

Line crossing

39
Q

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

A

True

40
Q

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

A

Pen or Pasture

41
Q

_____ is defined as the average age of the parents.

A

Generation interval

42
Q

Name three accessory glands

A

Seminal vesicles, Cowper gland, Prostate gland

43
Q

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

A

Horse

44
Q

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

A

Sperm

45
Q

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

A

False. Contains more

46
Q

______ are examples of species crossing.

A

Beefalo, hinny, mule, and zonkey.

47
Q

What are the three types of penises?

A

Fibroelastic penis
Vascular penis
Sigmoid Flexure

48
Q
A

Animal Science (1 decks)

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