Re: What are the chances of me keeping hair or losing it?

Well, it is a bit hard to say since you didn't put your gender.  Male 
baldness seems to be related to testosterone levels.  The length of your 
ring finger is supposed to be a good indication of your testosterone level 
- long = high.  Long is if it is longer than your middle finger or much the 
same length.  If it is high then you might get male pattern baldness - 
receeding hairline.  

If your dad has not gone bald and your hair looks like his then you'll 
probably be more likely to be like him than your maternal grandfather.  
Keep an eye on your brother too - whatever happens to him is quite likely 
to happen to you.  Try not to stress about this - stress can make your hair 
fall out!

Hope this helped
Yvonne