[Lancey Howard]

For your attempt at trying to sound intellectual, you do realize, don't you, that women have an XX and men have XY?

Hmm.. I thought DNA was a string of double helixes that formed codons which formed genes which make up chromosomes, and that XX and XY was a reference to chromosomes? But hey, you're the microbiologist, so I'll defer to your genius.

[metmom]

No man can EVER have the exact same DNA as his mother.

Understanding the difference between XX and XY is high school biology and does not require a degree in micro....