Lesson 3 – Concepts of Disease Resistance including Major Genes exam

1. Genetics of disease resistance in farm animals

2. Disease Resistance in Livestock: an updated review

3. Breeding for disease resistance in livestock/farm animals

4. Breeding for disease resistance in livestock/farm animals

5. Future challenges in breeding for disease resistance in livestock sector

6. The most suitable parameter of selection against mastitis is the

Lymphocyte count in blood

Somatic cell count (SCC) of milk

Leucocyte count in blood

All of these

7. Single allele or gene influencing more than one distinct trait or
character is called ________

Polygenes

Epistasis

Multiple alleles

Pleiotropy

8. Genetic resistance to diseases appear to be

specific and not general

Neither specific nor general

general and not specific

Either specific or general

9. Genetic resistance to diseases appear to be influenced by

Specific genes

Single pair of genes

Many genes

None of these

10. Immunity, in general, is also called as

Vaccination

Disease resistance

Susceptibility

None of these

11. The lack of immunity is known as

Susceptibility

Disease resistance

Vaccination

None of these

12. The most suitable parameter of selection against mastitis is the of milk

13. Single allele or gene influencing more than one distinct trait or
character is called

14. Locus that correlates with variation of a quantitative trait in the
phenotype of a population is called a .

15. is a gene whose influence on the phenotypic expression for
a particular disease is always evident, regardless of how this effect is
modified by other genes.

16. The condition of an increase in the severity of a disease in subsequent
generations is termed as .

17. Problems encountered in developing livestock genetically resistant to
diseases:

18. Breeding for maintaining stocks with better udder health

19. Genetic selection for disease resistance

20. Discuss on the immunological control of disease resistance:

21. Zebu cattle appears to be more susceptible to diseases than Bos
taurus cattle

True

False

22. Genetic resistance to diseases appear to be specific and not general

True

False

23. Genetic resistance is governed by many genes and not due to a
single pair of genes

True

False

24. Genetic resistance of a population to most of the diseases in a
particular geographical area is a kind of adaptability

True

False

25. There is possibility of presence of a major gene influencing disease
resistance to all the diseases

True

False