In order to investigate the way that genes influence bones and joints, we are asking both non-identical and identical twins to participate in the study.
(the way; genes; influence bones and joints) (we; are asking; both non-identical and identical twins; to participate in the study) (both non-identical and identical twins; to participate; in the study)
the way we both non-identical and identical twins
genes are asking to participate
influence bones and joints
both non-identical and identical twins to participate in the study
in the study