Which term refers to the position of a gene on a chromosome?
A) Allele
B) Locus
C) Genotype
D) Phenotype
What is the observable characteristic of an individual called?
A) Genotype
B) Phenotype
C) Locus
D) Allele
Which type of mutation changes one nucleotide but does not alter the amino acid sequence?
A) Missense mutation
B) Nonsense mutation
C) Frameshift mutation
D) Synonymous mutation
What type of mutation converts an amino acid into a stop codon?
A) Missense mutation
B) Nonsense mutation
C) Synonymous mutation
D) Frameshift mutation
Which Mendelian disorder in cattle is caused by a single base substitution in the urea cycle?
A) Myostatin deficiency
B) Ehlers-Danlos syndrome
C) Citrullinaemia
D) Hip dysplasia
In citrullinaemia, what is the genotype of a healthy individual?
A) dd
B) Dd
C) DD
D) Both B and C
What is the result of a myostatin deficiency in cattle?
A) Increased fertility
B) Increased muscle mass
C) Reduced feed intake
D) Both B and C
Which type of inheritance pattern occurs when heterozygotes express an intermediate phenotype?
A) Dominant
B) Recessive
C) Co-dominance
D) Incomplete dominance
Genome sequencing technology capable of real-time sequencing is:
A) Sanger sequencing
B) Second-generation sequencing
C) Illumina sequencing
D) Oxford Nanopore Technology
Which of the following is the primary challenge of genome assembly?
A) Inability to detect SNPs
B) The high cost of sequencing
C) Repetitive DNA segments
D) Slow data analysis
What concept describes traits influenced by multiple genes with additive effects?
A) Mendelian inheritance
B) Genetic drift
C) Polygenic inheritance
D) Co-dominance
The Breeder’s Equation predicts:
A) The effect of mutations
B) The response to selection
C) Heritability changes over time
D) Environmental influences on genetics
Genome-Wide Association Studies (GWAS) are used to:
A) Identify SNPs associated with specific traits
B) Sequence the entire genome
C) Measure gene expression
D) Design primers for PCR
Linkage disequilibrium (LD) refers to:
A) Genes controlling multiple traits
B) Non-random association of alleles
C) Random mutations in genes
D) A decrease in heritability over time
Which gene action results in one gene influencing two or more unrelated traits?
A) Polygenic inheritance
B) Incomplete dominance
C) Pleiotropy
D) Genetic drift
Which of the following is a common unintended genetic consequence of breeding for specific traits?
A) Increased genetic diversity
B) Inbreeding depression
C) Co-dominance
D) Positive genetic correlations
Which diagnostic tool amplifies specific DNA sequences?
A) ELISA
B) GWAS
C) PCR
D) NGS
In PCR, what is the temperature used during the denaturation step?
A) 50-65°C
B) 72°C
C) 94°C
D) 100°C
A disadvantage of PCR is that it:
A) Is costly to perform
B) Requires prior knowledge of the target sequence
C) Introduces errors in primer design
D) Only works with RNA
Quantitative PCR (qPCR) is used to:
A) Amplify DNA sequences
B) Sequence genomes
C) Measure the amount of DNA or RNA in real-time
D) Perform gel electrophoresis
Which technique does not require thermal cycling for DNA amplification?
A) Sanger sequencing
B) Isothermal amplification
C) Illumina sequencing
D) Reverse transcription PCR
Which term refers to the use of genetic tools in maintaining genetic diversity in wildlife populations?
A) Companion animal genomics
B) Conservation genetics
C) PCR
D) Genomic prediction
What does DNA metabarcoding help identify?
A) Single mutations in companion animals
B) Pathogen genomes in a sample
C) Multiple species in complex samples
D) Viral sequences in PCR products
Which of the following diseases is diagnosed using PCR in veterinary practice?
A) Canine parvovirus
B) Lyme disease
C) Avian influenza
D) All of the above
ELISA is primarily used to detect:
A) Antibody levels
B) DNA sequences
C) Protein structures
D) Genetic variants
Which sequencing technology is known for its high accuracy but slow and costly nature?
A) Second-generation sequencing
B) Illumina sequencing
C) Sanger sequencing
D) Oxford Nanopore Technology
In animal breeding, what does the selection differential refer to?
A) The variation in the genetic makeup of the population
B) The difference between selected individuals and the population average
C) The number of animals selected for breeding
D) The response of the population to environmental changes
Heritability (h²) refers to:
A) The degree to which a trait is passed from parent to offspring
B) The impact of environmental factors on trait variation
C) The interaction between genotype and phenotype
D) The likelihood of mutations in offspring
Which example of a Mendelian disorder is inherited in a recessive manner?
A) Myostatin deficiency
B) Ehlers-Danlos Syndrome
C) Citrullinaemia
D) None of the above
What is the purpose of genome annotation?
A) To sequence DNA
B) To detect mutations
C) To identify genes and functional elements within the genome
D) To compare genomes across species
What does epigenetics refer to?
A) Mutations in the DNA sequence
B) Chemical modifications that regulate gene expression without changing the DNA sequence
C) Non-coding regions of DNA
D) The inheritance of only maternal DNA
Which of the following sequencing technologies uses fluorescently labeled nucleotides and bridge amplification?
A) Sanger sequencing
B) Illumina sequencing
C) Oxford Nanopore Technology
D) Isothermal amplification
Polygenic traits in animals, such as milk production, are most influenced by:
A) A single gene
B) Many genes with small effects
C) Environmental factors only
D) Dominant alleles
Heritability values range between:
A) 0 and 1
B) -1 and 1
C) 0.25 and 0.75
D) 0.50 and 2.0
Which type of study helps to identify SNPs associated with specific traits in animals by comparing genetic differences between groups?
A) Quantitative PCR
B) Genome-Wide Association Studies (GWAS)
C) Sanger sequencing
D) Genetic drift analysis
Which technique is used to estimate the breeding value (EBV) of livestock?
A) Genome sequencing
B) Genetic drift analysis
C) Genomic prediction
D) PCR
What genetic tool is used to detect inherited conditions in companion animals, such as hip dysplasia in dogs?
A) ELISA
B) GWAS
C) DNA metabarcoding
D) Genetic testing
Which of the following is a benefit of using genomic data in conservation genetics?
A) Reduces the need for PCR in wildlife
B) Helps prevent inbreeding depression
C) Minimizes gene flow in populations
D) Increases the frequency of rare alleles
Which diagnostic tool measures the level of gene expression in real-time?
A) PCR
B) Isothermal amplification
C) Reverse transcription PCR
D) Quantitative PCR (qPCR)
What is the purpose of using ELISA in veterinary diagnostics?
A) To detect the presence of antigens or antibodies in a sample
B) To sequence DNA fragments
C) To amplify RNA for analysis
D) To visualize DNA fragments through gel electrophoresis
Which PCR modification converts RNA into DNA for amplification, allowing detection of RNA viruses?
A) Quantitative PCR (qPCR)
B) Reverse transcription PCR (RT-PCR)
C) Isothermal amplification
D) DNA metabarcoding
What is the process of visualizing DNA fragments after PCR using gel electrophoresis dependent on?
A) Fragment size
B) DNA quantity
C) RNA content
D) Temperature of the reaction
A major limitation of PCR is:
A) Its inability to detect small DNA fragments
B) The requirement for prior knowledge of the DNA target sequence
C) Low sensitivity to pathogens
D) Lack of specificity in DNA amplification
Which process does DNA metabarcoding facilitate in veterinary parasitology?
A) Diagnosis of single-gene mutations
B) Identification of multiple parasite species in complex samples
C) Detection of SNPs
D) Sequencing the genomes of parasites
In which animals is Loop-Mediated Isothermal Amplification (LAMP) commonly used for diagnosing infections?
A) Cows
B) Poultry
C) Dogs
D) Sheep
Which gene is involved in regulating muscle growth, mutations in which lead to "double muscling" in cattle?
A) MC1R gene
B) MSTN gene
C) COL1A1 gene
D) MYO5B gene
Which gene action occurs when both alleles in a heterozygote express their phenotypes?
A) Co-dominance
B) Incomplete dominance
C) Recessive inheritance
D) Pleiotropy
Which of the following species has been studied for genetic factors contributing to dilated cardiomyopathy, guiding breeding programs in conservation?
A) Wolves
B) Marmots
C) Foxes
D) Giraffes