A) hybrid vigour is not long standing due to inbreeding depression
B) they are not allowed to grow their own seed
C) it is always associated with increased heterozygosity
D) government has accepted Dunkels proposals
Correct Answer: A
Solution :
Hybrid vigour or heterosis is a phenomenon where the \[{{F}_{1}}\] generation of a cross between inbreed lines is superior to the parantal lines. The farmer need to purchase fresh hybrid seeds every year because hybrid vigour is not long standing due to inbreeding depression. According to dominance hypothesis of inbreeding depression the intercrossing of inbreed will give hybrid having deleterious recessives of one parent hidden again by dominant alleles, contributed by the other parents.
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