( ( ( One feature ) ( of ( gametogenesis ( that ( is ( common ( to ( ( the production ) ( of ( ( ( both sperm ) and ) eggs ) ) ) ) ) ) ) ) ) ) ( ( is ( ( meiosis , ) ( ( ( a type ) ( of ( cell division ) ) ) ( that ( reduces ( ( ( the number ) ( of chromosome ) ) ( sets ( ( each ( daughter cell ) ) ( contains ( by half ) ) ) ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (NP (CD One) (NN feature)) (PP (IN of) (NP (NP (NNS gametogenesis)) (SBAR (WHNP (WDT that)) (S (VP (VBZ is) (ADJP (JJ common) (PP (TO to) (NP (NP (DT the) (NN production)) (PP (IN of) (NP (NP (DT both) (NN sperm)) (CC and) (NP (NNS eggs))))))))))))) (VP (VBZ is) (NP (NP (NNS meiosis)) (, ,) (NP (NP (DT a) (NN type)) (PP (IN of) (NP (NN cell) (NN division))) (SBAR (WHNP (WDT that)) (S (VP (VBZ reduces) (SBAR (S (NP (NP (DT the) (NN number)) (PP (IN of) (NP (NN chromosome)))) (VP (VBZ sets) (SBAR (S (NP (DT each) (NN daughter) (NN cell)) (VP (VBZ contains) (PP (IN by) (NP (NN half))))))))))))))) (. .)))
One feature of gametogenesis that is common to the production of both sperm and eggs is meiosis, a type of cell division that reduces the number of chromosome sets each daughter cell contains by half.
(ROOT (S (NP (NNS Meiosis)) (VP (VBZ is) (NP (NP (NN part)) (PP (IN of) (NP (NP (DT the) (NN process)) (PP (IN of) (NP (NP (NNS gametogenesis)) (, ,) (SBAR (WHNP (WDT which)) (S (VP (VBZ is) (NP (NP (DT the) (NN production)) (PP (IN of) (NP (NN sperm) (CC and) (NNS eggs))))))))))))) (. .)))
Meiosis is part of the process of gametogenesis, which is the production of sperm and eggs.