@Narayangarh, I believe you are right on the methodology (how about twins?) but eternalsunshine (of a sportless mind)'s point was about mutation on how one sperm might have been "mutated" to lead the way.

@eternal, the reference on "my theory" was merely a humble satire to the Nobel laurete we have in this thread, read his posting and you will understand. At this time, I still find it hard to believe in mutation Maybe one of the sperm had the right angle or tasted the right mix..whatever. Mutations in the past (or even now) are not induced purposefully, it just happened that the conditions were ripe (like presence of certain bacteria, other physical traits like temp/pressure in that region of the cell)to bring upon the mutation. But, since I have no experiments to prove my theory, I have to laydown my arguments as I definately need more understanding of the subject to counter what you have said. Thanks for knowledgable input/discussion. Help this Narayangarh friend of ours now.