There have been lots of cases of tom boys in our society today. Some parents have tried to find the solutions or rather the cause of this in their children. In order to answer their questions and help the parents out frustrations, i believe this study should also be conducted.
Yes, a similar study should be done for humans because science should never stop discovering. It would be interesting to see the results. There is no reason we could not do the same study in humans. Mothers who are pregnant with triplets should be examined for future scientific discoveries. This is how science pushes us forward.
No, the results of this study in dogs are too insignificant to warrant the time and expense of conducting a study for humans. Since it's less common for humans to have multiple births than dogs, the opportunities for a similar study are far less and as a result the study would take longer to complete. Also, the term "tomboy" is colloquial rather than being a true physical condition, so to gauge accurate results using a term like that would be difficult.
It does not matter. It is pointless and stupid. Some women are more interested in things that we consider "boyish" and some men are more interested in things we consider "girlish", but to do this kind of research would further devide genders, and continue to try and define people based on sex characteristics.