Genes aren't the only factor. Because you inherit one APOE gene from your mother and another from your father, you have two copies of the APOE gene. Having at least one APOE e4 gene increases your risk of developing Alzheimer's disease. If you have two APOE e4 genes, your risk is even higher.
Compound Time Signatures In compound time signatures, the beat occurs on a dotted note and is divisible by three. The most common compound time signatures are 6/8, 9/8 12/8.
Forum (6) Echo Time. (TE) The echo time represents the time in milliseconds between the application of the 90 pulse and the peak of the echo signal in spin echo and inversion recovery pulse sequences. See also Repetition Time, Spin Echo Sequence and Inversion Recovery Sequence.