Evolutionary Biology 14: Quant. genetics

Question 1

Phenotypic variance equation?

Answer 1

Vp (Phenotypic Variance) = Genetic Variance (Vg) + Environmental Variance (Ve)

Vp = Vg + Ve

Question 2

Genetic variance equation?

Answer 2

Vg = Va (Additive Variance) + Vd (Dominance Variance)

Vg = Va + Vd

Question 3

Narrow-sense heritability equation?

Answer 3

h^2 = Va / Vp

Question 4

If Vg = 50, Vp = 100, h^2 = 0.5

Vd = ?
Ve = ?

Answer 4

Vg = 50
Vp = 100
h^2 = 0.5

0.5 = Va/100
Va = 50

Vd = 0
Ve = 50

Question 5

Breeder’s equation?

Answer 5

R = h^2.S

S = Selectional Differential
R = Response to Selection