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.
1 Time signatures define the amount and type of notes that each measure contains. 2  The first measure is in 4/4 time and the second measure is in 3/4 time. 3  The first measure (4/4) contains four quarter notes. 4  The second measure (3/4) contains three quarter notes.  Next, we will discuss non-quarter-note time signatures.