[Garth Tater]

"...which means that at least 18 of the gggg-gr generation didn't pass any of their genome to you"

Chromosomes aren't passed along as complete units from your parents with one chromosome of each chromosomal pair being passed along and one being left behind. Chromosome pairs in germ cells do a bit of mixing during meiosis before creating the 23 (now unique) single chromosomes that are passed along via the gamete. Each of your parents 46 chromosomes passed along some genetic content.* As did each chromosome of each of their parents, as did each chromosome of each of their parents, etc., etc., etc,. So you really don't have any of your ancestors' chromosomes (those got shuffled up and re-dealt during meiosis) and you would have to go way past the gggg-gr generation before all of the genetic code of any particular chromosome from any particular ancestor fell completely out of your genetic make up.

* okay, I'm not too sure about that XX vs XY stuff and how it works here, so maybe it's only 45 of the 46 chromosomes that pass along some of their code... maybe 44?  44.5?**

** sex is confusing

[Grampa Dave]

This is the part that gets really confusing.

[SunkenCiv]

There are mutations, which are not often; there's a bunch of the base pairs which apparently do nothing but continue to get passed down. As gametes are built, recombination occurs, but not on every chromosome, as it is a random process, resulting in a slight shuffle of the mostly inert base pairs, but the net effect is not a perfect 25% of each grandparent -- in fact, it *could* result in one grandparent being completely 'dealt out'. Overall there are about 6 million variants in the human genomes of two unrelated parents, but it sez here, "Males average about 27 crossovers per child and females average about 41 crossovers per child."

[Grampa Dave]

Thanks to everyone for their excellent and sometimes humorous inputs on a complicated issue, DNA and genealogy.

A female sibling was told by a supposedly good genealogist that our Indian DNA was not showing up because Indian Women married our male ancestors.

Also, the since my sibling and her DNA tested daughter are women, that we might not see any Indian DNA due to the women from the past DNA to our current living women.

Like Garth, my mind just freezes up with this issue? (I still know which bathroom to use when away from our home!)

Is this female Genealogist possible correct?