Exam 2 Flashcards
The goal of male reproductive system is to store gametes, produce male hormones, and passage for urine
True
The testes produce __________.
Testosterone
Where do sperm cells mature in the male reproductive tract?
Epididymis
Gametes have the the same number of chromosomes as any other cells in the body.
False
What animal has a corkscrew shaped penis
Boar
Gametes have the same number of chromosomes as any other cells in the body
False
______ has testes inside the body.
Rooster
Line crossing is a breeding system that results in non-fertile offspring.
False
Spermatozoa are developed in the
Testicles
The _____ organ in the male produces testosterone?
Testicles
Where is semen deposited in a cows reproductive tract during natural mating?
Vagina
What is an intact male pig called?
Boar
Where is the nucleus located in sperm cells?
Head
Transcription is a type of nuclear division which results in germ cells containing one member of each chromosome pair.
False
Which livestock species has a vascular penis?
Stallion
How many spermatids are yield during meiosis of the primary germ cell?
4
When does reproduction begin?
Copulation
When does reproduction begin?
Copulation
Which selection method uses numerical rating by combining performance traits into a single number?
Selection index
Sus scrofa is the scientific name for
Swine
What type of mating system does the poultry and rabbit industry use?
Hand Mating
Independent culling is a selection method where animals are removed from the herd if they don’t meet a minimum standard.
True
Developing breeding stock with high predicted inheritance is the objective of which of the following?
Purebred producer
Using two or more breeds in one breeding system with good hybrid vigor is know as
Composite breeding
Heritability is amount of __________ expression of a trait transmitted to offspring
Phenotype
Tandem selection is the most effective selection method.
False
Which of these traits has low heritability and high heterosis?
Reproduction
Members of a variety of livestock with related descent and distinguishable characteristics are a
Breed
The molecule responsible for inheritance is
DNA
Bos indicus is the scientific name for
Brahman
_______ only allows specific individuals to mate.
Selection
True or False? The genotype of an animal cannot be seen.
True
T or F? The phenotype of an animal cannot be measured or seen.
False
An animal with recognizable breed traits and known registered ancestors is called _________
Purebred
______ is the transmission of genes from parents to offspring
Inheritance
A recessive allele can be overpowered by a ______ allele.
Dominant
Increased performance of offspring over the average of the parents is called
Heterosis
Mating unrelated individuals of the same breed is ______
Line crossing
Inbreeding is defined as the mating of closely related individuals. T or F?
True
Which mating system requires the least amount of labor, pen/pasture or AI?
Pen or Pasture
_____ is defined as the average age of the parents.
Generation interval
Name three accessory glands
Seminal vesicles, Cowper gland, Prostate gland
Which of these animals is the oldest when it reaches puberty on average? Horse, Pig, Goat or Cattle
Horse
Seminiferous tubules are the site of _____ production in the testes.
Sperm
An ejaculate contains 5% of fluids from accessory sex glands. T or F?
False. Contains more
______ are examples of species crossing.
Beefalo, hinny, mule, and zonkey.
What are the three types of penises?
Fibroelastic penis
Vascular penis
Sigmoid Flexure
