( But ( ( at ( some point ) ) ( , ( ( ( ( ( ( a ( random mutation ) ) ( on ( a ( non-sex chromosome ) ) ) ) , ) ( known ( as ( an autosome ) ) ) ) , ) ( ( may ( favor ( ( the development ) ( of ( ( one sex ) ( over another ) ) ) ) ) ) . ) ) ) ) )
(ROOT (S (CC But) (PP (IN at) (NP (DT some) (NN point))) (, ,) (NP (NP (DT a) (JJ random) (NN mutation)) (PP (IN on) (NP (DT a) (JJ non-sex) (NN chromosome))) (, ,) (VP (VBN known) (PP (IN as) (NP (DT an) (NN autosome)))) (, ,)) (VP (MD may) (VP (VB favor) (NP (NP (DT the) (NN development)) (PP (IN of) (NP (NP (CD one) (NN sex)) (PP (IN over) (NP (DT another)))))))) (. .)))
But at some point, a random mutation on a non-sex chromosome, known as an autosome, may favor the development of one sex over another.
(ROOT (S (NP (NNS Autosomes)) (VP (VBZ is) (NP (NP (DT another) (NN term)) (PP (IN for) (NP (NN body) (NNS chromosomes))))) (. .)))