Over in Comments on Cecil’s columns, there’s a question about predicting the genders of siblings: http://www.straightdope.com/ubb/Forum1/HTML/000204.html
I’m wondering if, statistically, most families are 50-50 male-female, or if in a particular family, there may be a preference for one gender over the other, which would even out in the general population.
For example, my wife came from a family of 6: 1 boy, 5 girls. I have 1 brother, 0 sisters.
any one else care to contribute to a totally unscientific survey?