Beef Cattle Breeds
4. Red Angus
Age at puberty
Longevity (once a year every year for 7-9 years)
5. Chester White
6. Poland China
Southwest Ohio (Cincinnati) in 1833
Black with six white points
American Blood System
What is wool graded on?
Diameter/Fineness of the fiber.
Number of Crimps (Waviness) per linear inch of fiber.
Greasiness/oiliness of the entire fleece.
Very Finely Crimped (most
crimps of all)
Dairy Cattle Breeds
Originated in Brittany, France in 1100 AD & later produced on the Isle of Jersey
Well established by 1700s
Brought to US (PA) in 1840
Light to dark fawn, with or without white markings
ASC 102 Exam Study Guide
Early humans were hunters (scavengers) before the domestication of
0.2% of human history has been lived with domesticated animals
Order of domestication:
The problem: to liv
Nutrients are the dietary substances we need to survive
60% of animals body mass is water
water requirements for animals depends on condition of animals
4-5 ibs of water for every ib of milk
Chapter 8: Digestion Part 1
o Three major types of digestive processes:
o Mechanical: refers to chewing and mixing.
o How else do we classify animals besides by what they eat
Metabolism: Part 1
After nutrients have been digested, they will be absorbed into the blood
After absorption the nutrients will be metabolized.
Once absorbed into the bloodstream, nutrients are transported to the liver to support
Monogastrics: chicken and pig
o Ruminants: cattle and sheep
Breeding value example:
o 23,500 Ibs milk per lactation
o 1,500 ibs above the population average
o How much of her superior performance is due to genetics, not
The flow of energy
o Food chain begins with plants
o Glucose used for
Can be linked to make starch
Can be linked to make cellulose
Flow of carbon through each element of the food chain
CO2 completely oxidized
Glucose highly redu
Taxonomy- a standardized, scientific system of classifying living things.
Systema Naturae- Linnaeus 1758.
System is used to organize study of life on earth.
Phylogeny reflects the evolutionary relationships of species
September 7th 2015
Sus Scrofa domestica- PIGGY
The Scope of animal agriculture:
o 60 percent of the land in US is for agriculture
o animal agriculture
grazing land (pasture)
crops fed to animals
by products (something left over after yo
Chickens most efficient for eggs for energy and protein.
Enzyme amalyse digestes carbohydrates (STARCH)
Trypsin digest Protein.
Lipase digests fat
Pepsin digests protein
Net energy accounts for loses in feces, urine, gas, urine and gas ene
200,00 years ago
o foragers and scavengers
o no hunting tools
o large herbivores would be too large to hunt
o bone marrow
Animals and early humans: 50,000 to 100,000 years ago
o Effective hunting tools developed
Spears and knives
Chapter 12: Genetics
Exam 3 (100 points) stuff from 10-12, cumulative (50 points).
Performance alone does not tell the whole story.
Performance=genetic potential + management
What is environment?
o Prenatal care
ASC Chapter 10 Reproduction
A gamete is a sex cell.
Female: oocyte (egg).
Somatic cells are diploid (2 copies of each chromosome). But gametes are haploid (1
copy of each chromosome).
At fertilization, gametes combine to form a single dipl
Chapter 5: Animal Products
In the Us, food is most important animal product.
o Dairy cows in the US
Goats, sheeps, camels, llamas, water buffaloes, yaks and horses.
Eggs are another major renewable animal food product in the US