39) Inbreeding and Wright’s inbreeding coefficient

Question 1

Inbreeding

Answer 1

Closely related animals are mated

• Brother and sister
• Sire and daughter
• Son and dam

Question 2

Purpose of inbreeding

Answer 2

Increase frequency of pairing of similar genes

Question 3

Inbreeding is essential to…

Answer 3

Development of prepotent animals

Stamping their characteristics on offspring

Question 4

Inbreeding can uncover…

Answer 4

Genes that produce abnormalities or death

Question 5

Inbreeding reduces…

Answer 5

Genetic diversity

Question 6

Inbreeding is practised to…

Answer 6

Fix desireable characteristics in a population

Question 7

Inbreeding can result in a high proportion of…

Answer 7

Recessive genes

Question 8

Inbreeding coefficient

Answer 8

Coefficient of relatedness

• Gradec of average genetic identity between relartives

Question 9

Inbreeding coefficient between: Parent and offspring

Answer 9

0.5

Question 10

Inbreeding coefficient between: Grandparent + grandchild

Answer 10

0.25

Question 11

Inbreeding coefficient can be used to measure…

Answer 11

Likelihood of genetic effects due to inbreeding

Question 12

Wrights

Answer 12

The percentage that the two alleles of a certain locus chosen at random are identical by descent

Question 13

Calculate inbreeding coefficient

Answer 13

F = ∑[(0.5^n+n’+1)x(1+F_A)]

• N and n’ = No. of intermediate generations between inbred progeny and the common ancestor*
• F_A = Own inbreeding coefficient of an inbred common ancestor*