( ( ( No population ) ( specific alleles ) ) ( ( were observed ) . ) )
(ROOT (S (NP (NP (DT No) (NN population)) (NP (JJ specific) (NNS alleles))) (VP (VBD were) (ADJP (JJ observed))) (. .)))
No population specific alleles were observed.
(ROOT (S (NP (NNP Allele)) (ADVP (RB frequecy)) (VP (VBZ is) (NP (NP (DT the) (NN rate)) (SBAR (WHPP (IN at) (WHNP (WDT which))) (S (NP (DT a) (JJ specific) (NN allele)) (VP (VBZ appears) (PP (IN within) (NP (DT a) (NN population)))))))) (. .)))