Topic: Animal Genetics & Breeding

The ratio of selection differential to the phenotypic standard deviation of a trait is known as:

In a multiple allelic system with 3 alleles (A₁, A₂, A₃), if frequency of A₁ = 0.25 and frequency of A₂ = 0.35, what is the frequency of A₃?

Match the column — Breeding systems and their definitions: TABLE-I1) Inbreeding2) Outbreeding3) Panmixia4) Grading up5) Cross breeding TABLE-IIa) New breed is evolvedb) Pure-bred is obtainedc) Mating of related individualsd) Random matinge) Mating of unrelated individuals

Which force changes gene frequency the slowest?

Match the column — Selection indices for poultry and their descriptions: TABLE-I1) Osborne index2) Sire Index3) Abplanalp Index4) BLUP5) Selection Index TABLE-IIa) Best method of selectionb) For selection of pullets and cockerelsc) For improving egg production in poultryd) Index of genetic worth of siree) Most powerful method of indexing sire

In which type of selection is only one trait selected at a time?

The product of realized heritability and selection differential is known as:

The 2N – 2 condition of chromosomes reflects:

Match the column — Types of inbreeding/outbreeding: TABLE-I1) Close breeding2) Line breeding3) Species hybridization4) Out-crossing5) Cross breeding TABLE-IIa) Less intensive form of inbreedingb) Simplest form of out breedingc) More intensive form of inbreedingd) Breed complementatione) Farthest form of out breeding

Which of the following females is heterogametic (produces two types of gametes regarding sex chromosomes)?