Topic: Animal Genetics & Breeding

Genetic gain per year is dependent upon:

‘Resemblance between relatives’ is the basis of estimation of:

Repeatability is generally estimated by which statistical method?

Match the column: TABLE-I TABLE-II 1) Pleiotropy a) Increase heterozygosity 2) Linkage b) Increase homozygosity 3) Inbreeding c) Random mating 4) Out breeding d) Transient cause of genetic correlation 5) Panmixia e) Permanent cause of genetic correlation

Match the column: TABLE-I TABLE-II 1) In crossing a) Mating between unrelated animals of the same breed 2) In cross-breeding b) Mating of purebred (inbred) males with unrelated females 3) Out-crossing c) Crossing of two different inbred lines of the same breed 4) Top-crossing d) Crossing of two different inbred lines of different breeds 5) … Read more

Heterosis and Specific Combining Ability (SCA) are both caused by:

Traits governed by non-additive gene action (e.g., reproductive traits — fertility, viability, hatchability, litter size) have low heritability. If the heritability of a trait is low, the heterosis will be:

Polygenic inheritance, General Combining Ability (GCA) and resemblance between relatives are due to which type of gene action?

Reciprocal Recurrent Selection (RRS) is more suitable for poultry selection. RRS is used to improve:

Which of the following statements is/are true about hybrid vigour (heterosis)?