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STLOUISWOMAN's Photo STLOUISWOMAN Posts: 12,509
11/16/17 6:36 P

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RMUL2013 each child receives 1/2 of their DNA from the father & 1/2 of their DNA from their mother; however, it is not necessarily the exact same 50%. There will be enough similarities to show that they are siblings, but their DNA will not be an exact match UNLESS THEY ARE IDENTICAL TWINS.

Because you received 50% of your DNA from your father & 50% of your DNA from your mother, each of your children will get approximately 25% of their DNA from your father, 25% of their DNA from your mother, 25% of their DNA from their paternal grandfather & 25% of their DNA from their paternal grandmother.

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RMUL2013's Photo RMUL2013 Posts: 29,498
11/16/17 5:55 P

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If each one of my children had a DNA test run, would each test show the same results or would the test vary a little because of the different eggs, etc?

My son has his DNA tested. Since he got 50% from me, does that mean he got 25% of my dad and 25% of my mother?

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STLOUISWOMAN's Photo STLOUISWOMAN Posts: 12,509
11/15/17 8:54 P

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You're correct - DNA doesn't lie. You may discover things that you don't want to discover, but the DNA is telling you the truth no matter what other people say.

Sandy
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WESTERNSAGE's Photo WESTERNSAGE Posts: 4,719
11/15/17 1:17 P

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As my newly-found sister and I laugh about repeatedly, one key characteristic of DNA is that it does not lie. Your DNA-identified family members are there for real; you can't wish them away if you don't like them.



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STLOUISWOMAN's Photo STLOUISWOMAN Posts: 12,509
11/15/17 1:14 P

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What is DNA?
DNA, or deoxyribonucleic acid, is the hereditary material in humans and almost all other organisms. Nearly every cell in a personís body has the same DNA. Most DNA is located in the cell nucleus (where it is called nuclear DNA), but a small amount of DNA can also be found in the mitochondria (where it is called mitochondrial DNA or mtDNA).

The information in DNA is stored as a code made up of four chemical bases: adenine (A), guanine (G), cytosine (C), and thymine (T). Human DNA consists of about 3 billion bases, and more than 99 percent of those bases are the same in all people. The order, or sequence, of these bases determines the information available for building and maintaining an organism, similar to the way in which letters of the alphabet appear in a certain order to form words and sentences.

DNA bases pair up with each other, A with T and C with G, to form units called base pairs. Each base is also attached to a sugar molecule and a phosphate molecule. Together, a base, sugar, and phosphate are called a nucleotide. Nucleotides are arranged in two long strands that form a spiral called a double helix. The structure of the double helix is somewhat like a ladder, with the base pairs forming the ladderís rungs and the sugar and phosphate molecules forming the vertical sidepieces of the ladder.

An important property of DNA is that it can replicate, or make copies of itself. Each strand of DNA in the double helix can serve as a pattern for duplicating the sequence of bases. This is critical when cells divide because each new cell needs to have an exact copy of the DNA present in the old cell.

DNA is a double helix formed by base pairs attached to a sugar-phosphate backbone.



Credit: U.S. National Library of Medicine

Sandy
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