20 Amp Double-Pole Type BL Bolt-On Circuit Breaker. Circuit breakers are intended for switching and protection Circuit breakers are intended for switching and protection of your home's wiring from high temperatures caused by excess current higher than the rating of the wire.
A chromosome is a DNA molecule with part or all of the genetic material (genome) of an organism. Prokaryotes usually have one single circular chromosome, whereas most eukaryotes are diploid, like humans. Chromosomes in eukaryotes are composed of chromatin fiber. Chromatin fiber is made of nucleosomes. A nucleosome is a histone octamer with part of a longer DNA strand attached to and wrapped around it.
In some organisms, like bacteria, chromosomes have a circular shape. However, in most organisms that have a nucleus in their cells (this includes you), chromosomes are straight or linear. Many animals, including humans, have two types of chromosomes: autosomes and sex chromosomes. Sex chromosomes are those that are needed for determining sex (male or female) of an individual. Autosomes are all the rest of the chromosomes that are not needed for sex determination.