Animal Science Reproductive System
In the cell, the mitochondrion converts energy from glucose into what?
ATP
If the heritability estimate for number of pigs farrowed is 10%, lean cuts is 35%, birth weight is 20% and backfat thickness is 45%, which trait can be improved the fastest through selective breeding.
Backfat thickness
Are heritability estimates higher for beef or swine in general?
Beef
Is the cloaca located in male poultry, female poultry or both?
Both
Seminal Vesicles, prostate gland and Cowper's gland are labeled as what type of glands?
Bulbourethral Gland
If boar "A" is from a litter of 16 and has loin eye of 4.25 inches, boar "B" is from a litter of 14 and has a loin eye of 5.00 inches and boar "C" is from a litter of 10 and has a 6.10 inch loin eye, which boar would improves the fastest?
C
Which heritability estimates are higher: those for carcass or reproduction
Carcass
Removing of testicles of male animals to prevent breeding
Castration
The neck of the uterus that separates uterus from vagina.
Cervix
The first milk produced after a mammal gives birth that contains antibodies needed for immunity
Colostrum
What are genes?
Control your phenotype inherited from parents
Define Mitosis
Division of cells
The time a female animal is receptive to be bred, also called heat
Estrus
The length of a female's cycle from one estrus to the next.
Estrus Cycle
The union of the sperm and egg cells
Fertilzation
What is the normal presentation for a beef calf for birth?
Front feet first, head in between feet, shoulders, middle or body, hips then back legs and feet
The time an animal is pregnant
Gestation
In female livestock, the funnel-shaped structure located just below the ovary is called what?
Infundibulum
Where are the testes in male poultry?
Inside
What parts make up the oviduct in poultry?
Isthmus, Magnum, Vagina and Uterus
The period a mother is milking
Lactation
What part of the animal cell gives the ability to grow, digest food and divide?
Nucleus
How many functioning ovaries do female poultry have?
One
Where in the poultry reproductive system is the egg formed?
Ovary
Part of the repro system also called the fallopian tubes.
Oviducts
The release of the egg cell from the ovary
Ovulation
What reproductive part of male poultry puts the sperm inside the hen?
Papillea
The act of giving birth
Parturition
Age at which animals reach sexual maturity
Puberty
In male livestock, what does the sheath cover?
The penis
Part of the reproductive tract that allows the fetus to pass through at birth and also serves as a passageway for expelling urine?
The vulva
What is the major difference between the reproductive systems of livestock and poultry?
They have a cloaca and the male poultry reproductive organs are inside instead of out.
Part of the reproductive system also known as the womb.
Uterus
Part of the reproductive system that connects the vulva to the cervix.
Vagina
In poultry eggs, what is the ovum called?
Yolk
What is the incubation period for chicken eggs?
21 days
How many chromosomes does each egg or sperm have after cell division inn meiosis
1/2