29 Questions
Which reproductive biotechnology is NOT used to manipulate the reproductive process in cattle, carabaos, horses, and goats?
Pure breeding
What is the recommended system of breeding for improving native pigs?
Upgrading
What causes inbreeding depression in most reproductive traits in farm animals?
Parent-offspring mating
What is the average gestation period of a sow?
148 days
What type of breeding involves mating a native doe with an Anglo-Nubian buck?
Upgrading
What is the result of the interaction between the genotype of an individual and the environment in which it is raised?
G X E interaction
What is the term for the non-genetic factors affecting an individual?
Environment
What is the mathematical expression for the relationship between the genotype, environment, and phenotype?
P = G + E + (GxE)
What is the result of the gene expression in an individual?
Phenotype
What is the term for one of two or more alternative forms of a gene?
Alleles
What is the type of gene action where genes govern the expression of a phenotype in a measurable way?
Additive Gene Action
What is the frequency of the allele for white wool in the sheep population?
0.19
What is the percentage of heterozygous individuals in the sheep population?
36%
What is the frequency of the recessive allele bu in the mallard duck population?
0.8
What is the frequency of the droopy allele in the swine population?
0.08
What is the frequency of the yellow allele in the chicken population?
0.09
What is the frequency of the Polled allele in the cattle population?
0.40
What is the definition of broad sense heritability?
VG / VP
Which method of selection involves selecting animals based on the performance of their parents and grandparents?
Pedigree selection
What is the range of heritability values?
0 to 1
What is the breeding value of an individual assessed on in progeny testing?
The average performance of a random sample of its progeny
Which method of selection involves selecting individuals based on a single measurement of their phenotype?
Mass selection
What is the implication of a high heritability value of 0.5?
Half of the differences in phenotypes are genetic
What is the factor that does not affect gene and genotypic frequency in a breeding population according to the Hardy-Weinberg Law?
Vitrification
Which sex is considered heterogametic in horses?
Female
What type of intra-allelic gene action is exhibited when a black coat (BB) color Angus cattle is crossed with a red coat (bb) color, resulting in a heterozygous black color (Bb) offspring?
Incomplete dominance
What is the primary goal of animal breeding?
To improve the quantity of production of farm animals and their products
What is the definition of selection in animal breeding?
The process of choosing animals as parents of the next generation
What determines the rate of genetic improvement and survival of any population?
The physical and physiological processes of reproduction
Test your knowledge on the different characteristics of chicken phenotypes, including egg color, comb type, plumage pattern, and shank color. Learn how these traits are expressed mathematically through the interaction of genotype and environment.
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