Quantative Genetics

Question 1

What is the equation for phenotypic variance (Vp)?

Answer 1

Vp = Vg + Ve

Vp = phenotypic variance
Vg = genetic variance
Ve = environmental variance

Question 2

What is the equation for the broad sense heritability (H^2)?

Answer 2

H^2 = Vg / Vp

Question 3

Why is heritability a good predictor for short-term but not long-term response?

Answer 3

Allele frequencies change over time due to selection/genetic drift

Environment can change over time which changes Ve

Question 4

What is the equation for Vp when the norm of reaction is involved?

Answer 4

Vp = Vg + Ve + Vg*e

Question 5

What causes the plateau in artificial selection?

Answer 5

Genetic variation runs out

Or natural selection opposes artificial selection

Question 6

What is the equation for narrow sense of heritability?

Answer 6

h^2 = R/S

R = M1 - Mo

S = Ms - Mo

Question 7

What is the breeder’s equation?

Answer 7

R = h^2 * S

Question 8

What type of variance is crucial to respond to selection?

Answer 8

Va (additive genetic variance)

As only that is passed from parent to offspring