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).
A DNA test would say the child has 0% African DNA. As you can see, by chance the second child inherited both green beads from mom. In an ancestry DNA test, child 1 would be 0% African while child 2 would be around 4%. Even though they have the same parents. It all has to do with which DNA you happen to get from each parent.