Unit 4 AGB Quiz

1. Measures of the correlation between the repeated measurements of the same individual is known as (MPSC, 2019)

Repeatability
Phenotypic correlation
Genetic correlation
Heritability

2. The major cause of genetic correlation is (UK VO – 2024)

Pleiotropy
Segregation
Heterozygosity
Homozygosity

3. The reproductive traits of livestock indicate heritability as: (UK VO 2024)

Low
Zero
Medium
High

4. Heritability estimate of a trait is higher when there is (UK VO 2024)

Uniform environment
Genetically uniform population
Small population
Dominance effect

5. The sum of average effect of all the alleles, is known as: (UK VO 2024)

Dominance effect
Transmitting ability
Breeding value
Genetic load

6. Proportion of phenotypic variance caused due to additive gene variance is (JKPSC 2019)

Heritability
Correlation
Regression
Response

7. Correlation among different measurements on a character in the life of an animal is called (JKPSC 2019)

Repeatability
Heritability
Regression
Variance

8. Selection on the basis of individuality is most important, when h2 of the trait is: (PPSC 2016)

Low
Medium
High
None of the above

9. Which of the following is used to predict future performance of individual ? (RPSC 2019)

Genetic Correlation
Heritability
Repeatability
Phenotypic correlation

10. Which of the following is a heritable and fixable component of phenotypic variance? (MPPSC 2021)

Environmental variation
Additive variation.
Both of the above
None of the above

11. Which of the following statements indicates about narrow-sense heritability? (MPPSC 2023)

It is the ratio of genetic variance to total phenotypic variance
It is the ratio of environmental variance to total phenotypic variance
It is the ratio of additive genetic variance to total phenotypic variance
It is the ratio of phenotypic variance to total environmental variance

12. What will be the heritability range for wool quality traits like fiber diameter, staple length, crimp frequency etc.? (MPPSC 2023)

Less than 0-3
More than 0.5
Between 0-1 and 0-2
None of the above

13. The causes which are responsible for the genetic correlation between two characters are (MPPSC 2022)

Pleiotropy and linkage between genes
Dominance and lethal genes
Heterosis and pleotrophy
Linkage and multiple alleles

14. Family selection of the method of choice for traits with: (MPPSC 2022)

High heritability
Low heritability
Expression in one sex only
Large families

15. Intra-class correlation between repeated measurements of the same individual is a measure of (OPSC 2022)

Genetic correlation
Heritability
Phenotypic correlation
Repeatability

16. Which of the following variances is fully transmitted to the next generation? (OPSC 2022)

Dominance variance
Epistatic variance
Additive genetic variance
Phenotypic variance

17. Which of the following statements about heritability is incorrect?

It is always positive in value
It ranges from 0 to 1 or 0% to 100%
It is a dimensionless ratio
It measures the degree to which offspring resemble their parents in trait performance across populations

18. A trait has a heritability of 0.15 and a repeatability of 0.35. What can be inferred about this trait?

The trait is highly heritable and has low repeatability
The trait has high genetic variance and low environmental variance
The trait is influenced more by permanent environmental effects than additive genetic effects
The trait cannot be improved through selective breeding

19. In a population of dairy cattle, milk yield has a heritability of 0.3 and a strong positive genetic correlation with mastitis incidence.

Which of the following is the most appropriate breeding strategy?

Focus solely on selecting for high milk yield
Ignore mastitis incidence in the breeding program
Select only for mastitis resistance
Implement a multi-trait selection index that balances milk yield and mastitis resistance

20. A livestock breeder is working with a trait that has a narrow-sense heritability of 0.15 and a broad-sense heritability of 0.40. What can be concluded about the genetic components influencing this trait?

The trait is primarily influenced by additive genetic effects
The trait has low genetic variance overall
Non-additive genetic effects play a significant role in the trait’s expression
The trait is highly heritable and should respond well to mass selection

Jammu & Kashmir VAS Course

September, 2024

Participants 38

Unit 4 AGB Quiz

Anupama Bhattacharya September 16, 2024

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