Which statement is correct about centre of origin of plant : -
A
More diversity in improved variety
B
Frequency of dominant genes is more
C
Climatic condition more favourable
D
None
The answer is B.
Solution
N. I. Vavilov proposed that each crop plant originated in a particular region, its centre of origin (primary centre of diversity). In the centre of origin, the crop shows the maximum genetic diversity, with many wild relatives and primitive forms. Vavilov observed that in these centres the frequency of dominant genes is higher, while recessive forms are more common towards the periphery (secondary centres). So the correct statement is that the frequency of dominant genes is more at the centre of origin.
ConceptVavilov's centres of origin
Strategies for Enhancement in Food Production in past papers
59 questions from this chapter have appeared across 23 exam years.
