( ( To ( ( ( be sure ) , ) ( in ( sexually ( reproducing organisms ) ) ) ) ) ( , ( ( not ( all genes ) ) ( ( get ( into ( all gametes ) ) ) . ) ) ) )
(ROOT (S (S (VP (TO To) (VP (VB be) (ADJP (JJ sure)) (, ,) (PP (IN in) (S (ADVP (RB sexually)) (VP (VBG reproducing) (NP (NNS organisms)))))))) (, ,) (NP (RB not) (DT all) (NNS genes)) (VP (VBP get) (PP (IN into) (NP (DT all) (NNS gametes)))) (. .)))
To be sure, in sexually reproducing organisms, not all genes get into all gametes.
(ROOT (S (NP (DT All)) (VP (VBZ vertebrates) (VP (VB reproduce) (ADVP (RB sexually)))) (. .)))