i need help with my animal science assingment
Description
Learning Objectives
When you successfully complete this lesson, you will be able to:
Explain the role of genetics in animal production.
- Describe the process of cellular division with relation to the replication of cells containing a full complement of genetic information and the process of cellular division that ultimately produces cells containing only half of the genetic information.
Explain how variation in traits is passed from parent to offspring and how gene frequencies change in a population.
Summarize the implications of genetic engineering, the promise it holds for future animal production, and the opportunities that animals will have to provide even greater benefits to humanity.
Define animal breeding and explain its contributions to animal science.
- Explain how to use Expected progeny differences (EPDs) in beef cattle breeding.
- List the ways in which swine genetic improvement is similar to and different from the other major species.
- Describe the general principles of animal breeding as it applies to livestock species (beef cattle, dairy cattle, pork, and sheep and goats).
- These objectives reflect the important concepts of this lesson and should be used to guide your studies and your preparation for examinations.
Learning Activities- Read Chapters 8 and 9 in the textbook. Use these hints to help you get the most out of your time.
- Read the chapters completely through one time.
- Read the chapters a second time, extracting information from the text that relates to the learning objectives identified above.
- Create a study guide, using the learning objectives from above and the information from the text, to help you fully understand the material related to each learning objective.
- Review the key terms.
Review these PowerPoint slideshows:
Complete the following assignments:
- Lesson 6 Discussion
Lesson 6 Lab Assignment
Lesson 6 Discussion
Choose TWO of the following questions to answer. Develop a one-paragraph (150 words) answer to the question. Expand upon the questions and incorporate life experiences where possible.- What is the difference between an animal that is homozygous for a gene and one that is heterozygous?
- Describe the relationship between a gamete and a somatic cell with regard to the number of chromosomes in each.
- What are four methods by which gene frequencies are changed in a population? Briefly describe each.
- Why is it important for a beef cattle producer to know the performance of his or her herd? What are some types of performance programs? How do breed associations help?
Name some major goals for dairy cattle genetic improvement. How much more or less complicated does the use of heritability estimates seem in dairy cattle compared to beef cattle? Is the definition of heritability the same?
- Why is animal breeding more important as a discipline now than it was 50 years ago? Have all species of livestock benefitted from animal breeding research? Why or why not?
In what situation might it be advantageous to calculate estimated EPDs from pedigree information? What would you expect the accuracy of such EPDs to be?
- Describe the difference in the use of EPDs in the selection of seedstock herd compared to selection in a commercial herd.
*Make sure to read what other students have written and comment on at least one other student’s response.*
Lesson 6 Lab Assignment
Use the resources available to gain a better hands-on experience for the topics covered in lab. Potential research resources are not limited to, but could include the following: textbook, books, journals, magazines, Internet research (creditable sites), personal interviews and field visits.Animal BreedingPart 1. How is EPD (expected progeny difference) used in livestock selection and breeding practices? What is the importance of EPD and what information may be obtained from an EPD?Part 2. Use the example below of a bull’s EPD to describe the various categories that are included and why that knowledge is important to a producer. Please also tell me which bull you would choose to breed and why.
Charolais bulls for use on mature crossbred females.BullCEBWWWYWMCEMILKSCRCWREAFATMARBA11.6-427583.9231.1200.660.0410.18B2.9359992.212.1490.960.0410.22Breed Average3.10.724.443.847.90.614.70.260.0020.04Helpful Links:Genetics
EPD overview: Expected Progeny Difference
- DNA: The Structure of DNA
- Chromosomes: What is a Chromosome?
- Mitosis: Mitosis: The Amazing Cell Process that Uses Division to Multiply! (Updated)
Meiosis: Meiosis (Updated
Mitosis vs Meiosis: Mitosis vs. Meiosis: Side by Side Comparison
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