Topic 39

Question 1

Inbreeding

Answer 1

use of close relations for breeding e.g. mother to son; fixing desirable traits within a population?

Question 2

Results of inbreeding

Answer 2

increase the frequency of pairing similar genes; uncover genes that produce abnormalities or death; Lower performance, vigour, disease resistancem reproductive efficiency; increases frequency of abnormalities; e.g. spider lamb disease is from inbreeding; reduction in genetivc diversity inbreeding depression

Question 3

Inbreeding depression

Answer 3

reduced fertility; increased genetic disorders; loss of immune system function

Question 4

Wright’s inbreeding coefficient

Answer 4

coefficient of relatedness

Question 5

Relationship

Answer 5

r(%)

Question 6

Parent-offspring

Answer 6

degree of relatedness

0.5(50%)

Question 7

Grandparent-grandchild

Answer 7

degree of relatedness

0.25(25%)

Question 8

Great grandparent-great grandchild

Answer 8

degree of relatedness

0.125 (12.5%)

Question 9

Identical twins

Answer 9

degree of relatedness

1(100%)

Question 10

Full siblings

Answer 10

degree of relatedness

0.5(50%)

Question 11

Half siblings

Answer 11

degree of relatedness

0.25(25%)

Question 12

First cousins

Answer 12

degree of relatedness

0.0625 (6.25%)

Question 13

Second cousins

Answer 13

degree of relatedness

0.3125 (3.125%)