When discussing the role of genetics in human development, the research I am most often asked about is 'that' fruit fly study. Here are some sources for this research for those that are interested. Click here for an article from Time magazine or here for an article from Science Daily. For an up-dated interview click here.
For a detailed analysis, click here.
To understand why women have so much male DNA floating about their systems, click here.
To see why women who have multiple sexual partners are more likely to have daughters click here.