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This site is dedicated to the descendants of Peter and Regina Albrecht,
their forebears and their many, many descendants.
Index of Persons808 individuals, 208 families from file GEOFF'S 111202.GED (12 NOV 2002)Author: Geoffrey Anderson (ADOPTED) -- to -- William Henry CAVANAUGH Johann GERING -- to -- For the Family Tree shown graphically, click a Pedigree Chart: ALBRECHTS: Peter Albrecht // Christian Kaufman SENNERS: Regina Senner. Our (Peter & Regina [Senner] Albrecht) family tree is best viewed, explored, and edited on a PC after installing Family Tree Software; for example, you could download a free copy of Standard Edition Legacy (or other) software: https://legacyfamilytree.com/DownloadLegacy.asp. Then contact Geoff Anderson for our family tree files. Degrees of RelatednessThe common method of describing relatedness within a big family has always given me a headache. I can't remember what a "second cousin twice removed" is. Can you? But when I read Richard Dawkins' book "The Selfish Gene" I discovered therein a method of describing relatedness that suits me just fine.Because each parent provides exactly half of the genetic makeup of their child, the odds of, say, the mother sharing a particular gene with her child is exactly 50%, 0r 0.5. The parent-child relationship is the only one that is so deterministic, as we shall see. Let us assume a gene Q. We can do the same sort of calculation for any sort of kinship. The chances of two siblings sharing gene Q are also 0.5, because half the genes posessed by one sibling are to be found in the other on the average. Siblings, unlike the parent-child relationship, can have more or less than 50% of their genes matching. The 50% figure simply represents a probability of 0.5 that they share gene Q. The obverse of that statement is that they probably share 50% of their genetic material between them. Genetics is a statistical game, or at least it was until we had genome databases. Here then, is the method of determining a relatedness index. If we wish to discover the degree to which, say, Sylvia Lambert is related to Geoff Anderson, we first would find their common ancestors. That is easy -- Peter and Regina Albrecht. I'm going to put a little diagram here to show how they are related, but I'm only going to show first names to save space.
Peter and Regina
\
Gladys . . Laverne
\ \
Geoff Sylvia
Now if we count the steps from Geoff up the tree to Grandpa and Grandma Albrecht and then back down the tree to Sylvia, we get 4 steps. We multiply the "0.5" probability of the matching gene Q in each step by the number of steps. The chance then of Geoff and Sylvia sharing gene Q is (0.5 * 0.5 * 0.5 * 0.5) or 0.0625, which is just a hair over six percent. Their relatedness index is 0.0625. Another way of saying that is that Sylvia and Geoff probably share six percent of their genes in common. Looking at the tree above, we see that Geoff is 3 steps away from his aunt Laverne. Their relatedness index is (0.5 * 0.5 * 0.5) or 0.125. That is to say, they probably share one eighth of their genes in common. If we look a little further and wish to know the relatedness index between one of Geoff's children and one of Sylvia's, we need to count 3 steps up to the great-grandparents and 3 steps down again for a total of 6 steps. Lets simplify the expression this time as 0.5^6. Their relatedness index is 0.015625. They probably share one and a half percent of their genes in common. Now isn't this a lot easier? Richard Dawkins credits W.D. Hamilton for the method. If anyone would like to write a piece that could enlighten us about the "step-uncles twice removed" method, I would be glad to post it here. -- Ian Robinson
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Genealogical ChartsBrad Albrecht (son of Dan Albrecht, who is son of Oscar Albrecht) scanned these large paper documents and put them on his web site. Some of them were done by Mabel (Albrecht) Cutler, and some charts are the work of others. There is a very interesting clue to the value of labor way back when. See if you can find it. You may see them here: Brad Albrecht's Website Use your back button to return.Historical DocumentsGeoff Anderson (son of Gladys (Albrecht) Anderson) has provided some family historical documents.
A-s-root Copyright © 2002 by Ian Robinson |
