MBG 4020 QUIZZES | QUESTIONS AND ANSWERS | 2025/2026 UPDATE | WITH COMPLETE
SOLUTION
Inbreeding ______ homozygosity. - (ANSWER)increases
Effective pop size assumes: - (ANSWER)random mating, pairwise mating, parents make equal
contribution to next gen
To reduce inbreeding impose .... - (ANSWER)planned mating
Effective pop size can be altered without moving animals via - (ANSWER)Artificial insemination
Inbreeding _____ heterozygosity - (ANSWER)Decreases
As Relatedness and inbreeding increase: - (ANSWER)- Individuals become more similar genetically
(genetic variability decreases)
- SB concerned on future pop structure
- MB not as concerned about effects
- selection response decreases over time
- homozygosity increases
- limits proportion of beneficial alleles
Single birth species - (ANSWER)Greater maternal care
Short gestation interval - (ANSWER)litter bearing species
Multiple mating sets - (ANSWER)Egg laying species
Finite model - (ANSWER)as selection/genetic drift drives f(b) towards 1 - genetic variation declines since
q goes up to 1, p goes to 0 and 2pq to 0
- genetic progress measured in change of allele req for loci genotyped to select for improving trait
- selection based on SNP marker and genotype
, MBG 4020 QUIZZES | QUESTIONS AND ANSWERS | 2025/2026 UPDATE | WITH COMPLETE
SOLUTION
infinitesimal model - (ANSWER)- as selection/genetic drift continues, each loci will see a gradual change
of allele freq but some genetic variation will always remain
- doesn't use genotypes
- selection based on EBVs and phenotypes
Hybrid model - (ANSWER)as selection/genetic drift continues, each of the loci will see a gradual change
of allele freq
- loci of large effect may reach fixation
- due to myriad of loci of small effect, some genetic variation will always remain for this trait
- Marker assisted selection
Selection goals should: - (ANSWER)- Be based on breeder's goal for their kennel regardless of
phenotypes
- based on a combo of goals or standards established by the breed association and new breeders
opinions and preferences
Breed standards - (ANSWER)- do not NEED to be followed to have success in the breed
- should not remain static
Service & performance dog breeding are - (ANSWER)- objective rather than subjective
- success is easily predicted
if a horse is positive for HYPP... - (ANSWER)it can't be registered as a quarter horse
Heritability if we want to select for higher EBVs - (ANSWER)expect more selection response with a trait
with higher heritability
Selecting for health improvement has a lesser/greater response than racing peformance -
(ANSWER)lesser
SOLUTION
Inbreeding ______ homozygosity. - (ANSWER)increases
Effective pop size assumes: - (ANSWER)random mating, pairwise mating, parents make equal
contribution to next gen
To reduce inbreeding impose .... - (ANSWER)planned mating
Effective pop size can be altered without moving animals via - (ANSWER)Artificial insemination
Inbreeding _____ heterozygosity - (ANSWER)Decreases
As Relatedness and inbreeding increase: - (ANSWER)- Individuals become more similar genetically
(genetic variability decreases)
- SB concerned on future pop structure
- MB not as concerned about effects
- selection response decreases over time
- homozygosity increases
- limits proportion of beneficial alleles
Single birth species - (ANSWER)Greater maternal care
Short gestation interval - (ANSWER)litter bearing species
Multiple mating sets - (ANSWER)Egg laying species
Finite model - (ANSWER)as selection/genetic drift drives f(b) towards 1 - genetic variation declines since
q goes up to 1, p goes to 0 and 2pq to 0
- genetic progress measured in change of allele req for loci genotyped to select for improving trait
- selection based on SNP marker and genotype
, MBG 4020 QUIZZES | QUESTIONS AND ANSWERS | 2025/2026 UPDATE | WITH COMPLETE
SOLUTION
infinitesimal model - (ANSWER)- as selection/genetic drift continues, each loci will see a gradual change
of allele freq but some genetic variation will always remain
- doesn't use genotypes
- selection based on EBVs and phenotypes
Hybrid model - (ANSWER)as selection/genetic drift continues, each of the loci will see a gradual change
of allele freq
- loci of large effect may reach fixation
- due to myriad of loci of small effect, some genetic variation will always remain for this trait
- Marker assisted selection
Selection goals should: - (ANSWER)- Be based on breeder's goal for their kennel regardless of
phenotypes
- based on a combo of goals or standards established by the breed association and new breeders
opinions and preferences
Breed standards - (ANSWER)- do not NEED to be followed to have success in the breed
- should not remain static
Service & performance dog breeding are - (ANSWER)- objective rather than subjective
- success is easily predicted
if a horse is positive for HYPP... - (ANSWER)it can't be registered as a quarter horse
Heritability if we want to select for higher EBVs - (ANSWER)expect more selection response with a trait
with higher heritability
Selecting for health improvement has a lesser/greater response than racing peformance -
(ANSWER)lesser
