Quantitative Genetics

Question 1

Quantitative genetics

Answer 1

Inheritance of characters that don’t fall into a distinct class

Question 2

Example of quantitative genetics

Answer 2

Red wheat seeds x White wheat seeds

F1: all pink (intermediate dominance)

F2: 1 red: 4 lt red: 6 pink: 4 lt pink: 1 white

2 loci involved, 2 alleles each

+ increases redness, - has no effect on pigment

Question 3

Variance and standard deviation

Answer 3

Variance = standard deviation²

Question 4

Heritability

Answer 4

Proportion of total phenotype variance which is due to genetic variance

H² = V_G/V_P

Question 5

Broad-Sense Heritability

Answer 5

Includes gene-environment interaction

H² = V_G/(V_G+V_E+V_GE)

Question 6

Covariance

Answer 6

(X-Y) x (µX-µY)

Question 7

Correlation Coefficient

Answer 7

[CoV(X,Y) × (1/{n-1})] / (σX × σY)

Can vary between 0 and 1