Topic: Animal Refresher

If gene frequency of A = 0.7 and gene frequency of a = 0.3, the genotypic frequency of heterozygote (Aa) under Hardy-Weinberg equilibrium is:

Match the column — Genetic concepts and their associations: TABLE-I      TABLE-II1. Pleiotropy    a. Increases heterozygosity2. Linkage    b. Increases homozygosity3. Inbreeding    c. Random mating4. Outbreeding    d. Transient cause of genetic correlation5. Panmixia    e. Permanent cause of genetic correlation

Match the column — Miscellaneous genetics terms and associations: TABLE-I      TABLE-II1. R.S. (Reciprocal selection)    a. Upper limit of heritability2. R.R.S. (Reciprocal recurrent selection)    b. G + E3. Phenotype    c. Small population4. Random drift    d. Hull (Shull)5. Repeatability    e. Comstock

When parents of one generation pass the sex-linked character to the opposite sex in the next generation, it is known as:

Heterosis in the F₂ generation becomes:

Genes of sex-linked traits are present on:

The best basis of selection for estimation of carcass quality is:

Heterosis in the F₂ generation becomes:

Match the column — Types of crossing and their definitions: TABLE-I      TABLE-II1. In crossing    a. Mating between unrelated animals of the same breed2. In cross-breeding    b. Mating of purebred (inbred) males with unrelated females3. Out-crossing    c. Crossing of two different inbred lines of the same breed4. Top-crossing    d. Crossing of … Read more

Which of the following is/are true about Nucleus Breeding Schemes (NBS)?