Genetic Model for Qualitative Traits

Question 1

Simply inherited traits

Answer 1

Traits affected by one or few genes

Phenotypes of ____ are placed into categories

Environmental factors have little effect on the trait

Question 2

Polygenic traits

Answer 2

Affected by many genes
Generally described in numbers
Affected by environment

Question 3

Model for Quantitative traits

equation

Answer 3

P = mew + G + E
mew -> population mean

Question 4

Genotypic Value

Answer 4

Overall effect of all the genes carried by the animal on the phenotype of the animal for the trait

G = BV + GCV
[breeding value and gene combination value]

Question 5

Breeding Value

Answer 5

Part of genotypic value that can be transmitted for parents to offspring independent of the effects of dominance and epistasis

Considered a parental value

Question 6

Gene Combination Value

Answer 6

Part of the genotypic value that is due to gene combination effects due to dominance and epistasis

Question 6

Transmitting ability

Answer 6

TA
Used for dairy animals

Question 7

Progeny difference

Answer 7

PD
Used for beef/meat animals

Question 8

Breeding value equation

Answer 8

The breeding value of offspring can be viewed as the sum of the additive effects of the genes inherited from the sire and the additive effects of the genes inherited from the dam

Question 9

Producing Ability

Answer 9

PA
For repeated traits
The performance potential of an animal for a repeated trait

Question 10

Importance of producing ability

Answer 10

To commercial producers as a measure of productive capacity