3
Extension is a Division of the Institute of Agriculture and Natural Resources at the University of
Nebraska-Lincoln cooperating with the Counties and the United States Department of Agriculture.
Hand out notes page worksheet that have room for students to take notes and has example
pedigrees to work on it. Pause on slides with pedigrees to allow students time to figure out the
genotype of each individual on the pedigrees or answer what the offspring child would look like.
Walk through how calculating breed breakdown of a crossbred would go using the example slide.
This could then be investigated further if the students are interested in their own family history and
what their family genealogy is and what the percent of a specific ethnicity they may be.
• Present what your own genealogy percentage breakdown is if you know some of it.
• Example: I am 1/8 Austrian, ¼ Irish, 1/8 Scottish….etc.
Learning Activity 2: What’s Wrong with This Picture?
After going through pedigrees, review or introduce to the class the concept of livestock evaluation
(depending on where during the year you go over pedigrees as compared to what you look for in
livestock evaluation and the knowledge level of the class). Every person has their own way of
teaching livestock evaluation concepts, so feel free to use whatever you have done in the past.
• I stick to the basics of going over what to look for in muscling, finishing and structure of the
animal.
Pull out the pictures/video or live animals you have to evaluate and give them to go through and
evaluate the animals that are there based on the livestock evaluation principles you review with
them at the beginning of class. After they are done, pose the questions:
• In what order did you rank the class?
• Why did you place one over two and two over three and three over four?
• What really stuck out to you about the four of them?
Depending on what type of animal you decide to bring in or you may have to evaluate, set up the
scenario for your students with their worksheet (feel free to change the type of animal said in the
scenario based on what you have access to).
“There is an unnamed genetic disorder in your family’s cattle herd that is starting to become a
problem. The disease doesn’t have any physical symptoms that you or your family have noticed
yet. Not only does it kill the cattle, but the meat of the animal isn’t as appetizing and causes those
who eat it to become very sick.
Your parents have the pedigree of some of the cattle in the herd, but they don’t know what it
means. They don’t know what cattle might be carrying the disease or which ones are okay to eat.
They want to get to work on clearing out the cattle that have the disease, but don’t want to get rid
of the wrong cattle or save the cattle with the disorder.
You have had the experience to understand their pedigree and think you can help them out in
determining which cattle have the disease and which don’t, so you offer up your services.”
Have the students complete the worksheet pedigree and answer the few questions that the
parents have. Also be sure to explain that those are some of the sample cattle from your pasture
and that a few of them may have the disease, but we don’t know which ones.