How to Find a Match

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Below is a depiction of the course of the Y-chromosome and mtDNA in a family tree. The path of the y-chromosome is drawn in yellow, and the mtDNA drawn in green.

This family tree depicts 3 generations, a Father/Mother, 2 Sons 2 Daughters, 8 grand children through 4 grandsons (GS) and 4 granddaughters (GD).

The black lines represent the contribution of the spouse, either a different y-chromosome from husbands or different mtDNA from wives.

You can use this a model to draw out the information that you know. There are only 3 rules.

1. The Y-Chromosome is ONLY passed from father to son.
2. mtDNA is passed from mother to daughter AND son.
3. The son cannot pass the mtDNA on.

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