Post by Deleted on Sept 3, 2014 21:14:16 GMT
www.news-medical.net/news/20110329/Study-Donors-DNA-level-in-heart-transplant-recipients-blood-can-reveal-organ-rejection.aspx
It depends. It could have both. It may depend on how well or if a lab recognizes partial matches or weird things popping up in the results when they're doing comparisons. Another biggy is if a person's saliva/cheek cell DNA doesn't match the DNA from their own sperm or eggs. That may play into a case quite a bit if the crime scene DNA was from sperm, but when they check a suspect's DNA, they're checking it from a cheek swab. It may be the same with blood evidence at a scene?
Taking this from the other thread about DNA discrepancies.
"Bone marrow transplants can also confound forensic scientists. Researchers at Innsbruck Medical University in Austria took cheek swabs from 77 people who had received transplants up to nine years earlier. In 74 percent of the samples, they found a mix of genomes — both their own and those from the marrow donors, the scientists reported this year. The transplanted stem cells hadn’t just replaced blood cells, but had also become cells lining the cheek."
"Last year, for example, forensic scientists at the Washington State Patrol Crime Laboratory Division described how a saliva sample and a sperm sample from the same suspect in a sexual assault case didn’t match."
"How common are chimeras? We don't really know. We generally only find out about chimeras when their DNA is analyzed. It sure makes crime solving difficult, but it can also complicate finding organ donors."
www.nytimesdotcom/2013/09/17/science/dna-double-take.html?pagewanted=all
"Not long ago, researchers had thought it was rare for the cells in a single healthy person to differ genetically in a significant way. But scientists are finding that it’s quite common for an individual to have multiple genomes. Some people, for example, have groups of cells with mutations that are not found in the rest of the body. Some have genomes that came from other people.
“There have been whispers in the matrix about this for years, even decades, but only in a very hypothetical sense,” said Alexander Urban, a geneticist at Stanford University. Even three years ago, suggesting that there was widespread genetic variation in a single body would have been met with skepticism, he said. “You would have just run against the wall.”. . . . One woman discovered she was a chimera as late as age 52. In need of a kidney transplant, she was tested so that she might find a match. The results indicated that she was not the mother of two of her three biological children. It turned out that she had originated from two genomes. One genome gave rise to her blood and some of her eggs; other eggs carried a separate genome.
Women can also gain genomes from their children. After a baby is born, it may leave some fetal cells behind in its mother’s body, where they can travel to different organs and be absorbed into those tissues. “It’s pretty likely that any woman who has been pregnant is a chimera,” Dr. Randolph said. . . . ."