( Meiosis ( ( is ( ( ( the ( two-stage process ) ) ( of ( cell division ) ) ) ( that ( produces ( ( ( sperm ( and ( egg cells ) ) ) , ) ( ( during which ) ( ( this halving ) ( takes place ) ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (NNS Meiosis)) (VP (VBZ is) (NP (NP (DT the) (JJ two-stage) (NN process)) (PP (IN of) (NP (NN cell) (NN division))) (SBAR (WHNP (WDT that)) (S (VP (VBZ produces) (NP (NP (NN sperm) (CC and) (NN egg) (NNS cells)) (, ,) (SBAR (WHPP (IN during) (WHNP (WDT which))) (S (NP (DT this) (NN halving)) (VP (VBZ takes) (NP (NN place))))))))))) (. .)))
Meiosis is the two-stage process of cell division that produces sperm and egg cells, during which this halving takes place.
(ROOT (S (NP (NP (NNS Gametogenesis)) (, ,) (NP (NP (DT the) (NN production)) (PP (IN of) (NP (NN sperm) (CC and) (NNS eggs)))) (, ,)) (VP (VBZ takes) (NP (NN place)) (PP (IN through) (NP (NP (DT the) (NN process)) (PP (IN of) (NP (NNS meiosis)))))) (. .)))
Gametogenesis, the production of sperm and eggs, takes place through the process of meiosis.