ABG115D - Animal Breeding And Genetics - Significance Of Mendel’s Laws - Genetics Assignment Help

Assignment Task

Question 1

1.1 Specifically outline how each of the sub disciplines of genetics contribute to the subject of Animal breeding
1.2 What are the implications and significance of Mendel’s laws to Animal breeding
1.3 Consider two loci: One locus determines polled (P) or horned (p) condition. The other locus controls coat colour, red (R) or white (r). Alleles for polled and red conditions are dominant over alleles for horned and white conditions. Find the phenotypic ratios from mating animals with the following genotypes: PPrr X PpRr

Question 2
2.1 Using examples differentiate between qualitative and quantitative traits.
2.2 Discuss why is it important to estimate breeding values of livestock?

2.3 If the breeding value of a sire is estimated today using his own single record performance and again next year when more records are available from his progeny, you would expect “Choose one and give reasons for your answer”
a) the breeding value to go down
b) the breeding value to go up
c) the accuracy will probably go up
d) both the breeding value and the accuracy will go up.

2.4 There are several issues that are important in dealing with the new technologies in livestock breeding. Among others, briefly describe the ethics, food safety, and
commercialization aspects

Question 3

3.1 Define the term “ Hybrid Vigour”.
3.2 Using examples, briefly differentiate between Inbreeding and Crossbreeding
3.3 Describe 4 Selection Methods commonly used in Animal Breeding programs.
3.4 Discuss the importance of Livestock Performance Testing Schemes in Animal Breeding, and use examples of such Schemes.

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