( ( ( ( ( ( For example ) ( , ( ( two humans ) ( ( will both ) ( have ( ( human genes ) ( for ( ( ( ( ( eye color ) , ) ( blood type ) ) , ) etc. ) ) ) ) ) ) ) ) , ) but ) ( they ( may ( have ( ( different alleles ) ( of ( the genes ) ) ) ) ) ) ) . )
(ROOT (S (S (PP (IN For) (NP (NN example))) (, ,) (NP (CD two) (NNS humans)) (VP (MD will) (DT both) (VP (VB have) (NP (NP (JJ human) (NNS genes)) (PP (IN for) (NP (NP (NN eye) (NN color)) (, ,) (NP (NN blood) (NN type)) (, ,) (FW etc.))))))) (, ,) (CC but) (S (NP (PRP they)) (VP (MD may) (VP (VB have) (NP (NP (JJ different) (NNS alleles)) (PP (IN of) (NP (DT the) (NNS genes))))))) (. .)))
For example, two humans will both have human genes for eye color, blood type, etc., but they may have different alleles of the genes.
(ROOT (S (NP (NP (DT The) (NN majority)) (PP (IN of) (NP (JJ human) (NNS genes)))) (VP (VBP have) (NP (QP (CD two) (CC or) (JJR more)) (JJ possible) (NNS alleles))) (. .)))