Can a DNA sample taken from saliva determine sex?

Absolutely.

One of the standard marked looked at in a CODIS analysis in DNA fingerprinting is X or Y specific.

OF COURSE YES

BY USING GEL ELECTROPHORESIS WE CAN DETERMINE THE PERSON IS A MAN OR A WOMAN BY THE SEX CHROMOSOMES FOUND IN THE DNA SAMPLE FROM THE SALIVA

MAN XY

WOMAN XX

No. The sample might be contaminated or too small.

DNA Testing: An Introduction For Non-Scientists

An Illustrated Explanation

http://www.scientific.org/tutorials/articles/riley...

Yes

Yes I think it can. Our DNA has the xy xx thing in it and that tells us if it's a boy or girl..

The saliva would need to contain cells for karyotyping.

I only interject because someone mentioned "YY" and "XY." Close, but not quite XX = female and XY = male.

YY=dead.

Yes. That's one of the simplest DNA tests.

Maybe not food but spit or saliva most defently! And remember every parent can tell a doctor to take a test on the chil and by law they will find out and arrest you if your uderage. (not sayng it's you)

yes, we get somtic cell from saliva which contains whole genome. 22 pairs of somatic chromosomes + 1 pair of sex chromosome {(XY- in males) or (XX- in females)}

Yes - the whole X Y chromosome thing.