tapetoretinal degeneration degeneration of the pigmented layer of the retina. transneuronal degeneration atrophy of certain neurons after interruption of afferent axons or death of other neurons to which they send their efferent output.apetoretinal degeneration degeneration of the pigmented layer of the retina. transneuronal degeneration atrophy of certain neurons after interruption of afferent axons or death of other neurons to which they send their efferent output.
How accurate is the DNA Originsâ¢ test? The DNA Originsâ¢ test provides your ancestral proportions based on years of collaborative research of populations representing 4 ancestral groups. This research identified 144 informative markers in our DNA, called Ancestry Informative Markers (AIMs).
The three companies that offer this new form of autosomal DNA testing are Family Tree DNA, 23andMe, and Ancestry.com. Family Tree DNA offers a large variety of DNA tests for genealogists and this specific test is called Family Finder. The two similar tests are 23andMe and AncestryDNA.n autosomal DNA test can introduce you to those cousins who have taken the same test. Some of your newfound cousins will have genealogical information that you lack. By comparing notes and pooling your resources, you both win. Genealogists also use this test to confirm suspected connections between deceased ancestors.