Why is it a 50-50 chance that a baby will be a boy/girl rather than something else, like 55-45, etc.?
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Anonymous2007-11-27 5:53
>>14
Sperm cells carrying the Y chromosome are lighter, yes, so yes, they're a bit faster.
Male fetuses are also spontaneously aborted more often than female ones. I forget why. Possibly the mother's immune system rejects it.
>>16
You don't understand anything about probability.