Genetics is the study of genes, heredity, and genetic variation in living organisms. It is generally considered a field of biology, but it intersects frequently with many of the life sciences and is strongly linked with the study of information systems. The father of genetics is Gregor Mendel, a late 19th-century scientist and Augustinian friar. Mendel studied 'trait inheritance', patterns in the way traits were handed down from parents to offspring. He observed that organisms (pea plants) inherit traits by way of discrete units of inheritance.
Razors come in two varieties, dual bevel or single bevel. They are identified by whether both sides are angled, which creates a side-view like an isosceles triangle, or just single-angled. The single-angled is straight one one side and angled on the other. When talking about sharpening blades to a particular angle, the sharpening needs to occur equally to both sides of the dual-angle blade. For instance, the ideal shave is achieved with a 15 to 20 degree bevel angle.
Definitions: I make these definitions for the purpose of clarifying the concepts discussed on these pages. Other definitions may exist elsewhere. 1  A compound cut consists of two angles, the bevel angle and the miter angle. 2  The bevel angle (or blade tilt) is the tilt of the saw blade from vertical on the table saw. 3  This means that a normal square cut has a bevel of 0Â°. 4  Typically saws have a maximum bevel of 45Â°.