( Morc ( ( ( ( ( affects ( ( the ( earliest stages ) ) ( of ( sperm production ) ) ) ) , ) or ) meiosis ) . ) )
(ROOT (S (NP (NNP Morc)) (VP (VP (VBZ affects) (NP (NP (DT the) (JJS earliest) (NNS stages)) (PP (IN of) (NP (NN sperm) (NN production))))) (, ,) (CC or) (VP (VBZ meiosis))) (. .)))
Morc affects the earliest stages of sperm production, or meiosis.
(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.