Open Coil (uncovered) humbucker pickup. Covered humbucker pickup on a Les Paul. A humbucking pickup, or humbucker, is a type of electric guitar pickup that uses two coils to buck the hum (or cancel out the interference) picked up by coil pickups.n 1996, Kinman Guitar Electrix introduced replacement pickups for Stratocaster and Telecaster guitars. These were of the stacked humbucker design, where the lower pickup coil functions solely to cancel hum.
What does a karyotype show? A: A karyotype shows the shape, relative sizes and general structures of an organism's chromosomes. This technique, which uses special dyes and microscopes to view the chromosomes, is very useful for detecting large mutations or other abnormalities in an organism's genes.
It's a painless test, involving little more than a needle prick to obtain a tissue sample, but it can tell a lot about a person's health. Here's an overview of how karyotyping is done and what it can reveal. How Karyotypes Are Performed. A karyotype can be created from different types of tissue. Usually, a blood sample is all that's needed, but if there's a concern that a developing fetus has a chromosomal abnormality, amniotic fluid may need to be drawn.