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.
When the male and female gametes fuse during fertilization and zygote formation, the chromosome number is restored to 2n again. Thus, diploid cells are those which contain a complete set (or 2n number) of chromosomes whereas haploid cells are those that have half the number of chromosomes (or n) in the nucleus. In plant cells, the haploid or n stage constitutes a large part of the life cycle.