Q920
In a synthetic variety of maize produced by combining 10 lines, the loss of excess vigour in F2 generation will be
A.
1/10
AnswerB.
1/5
C.
1/4
D.
1/2
Answer: Option A
Solution
Answer: Option A
Solution:
In a synthetic variety of maize produced by combining 10 lines, the loss of excess vigour in F2 generation will be 1/10.Under the dominance hypothesis, detrimental recessive alleles accumulate in the homozygous state during inbreeding and cause a reduction in vigour or inbreeding depression.
As the synthetic variety is produced by combining 10 lines, therefore the loss of excess vigour in F2 generation will be 1 upon 10.