In the C and C++ programming languages, #pragma once is a non-standard but widely supported preprocessor directive designed to cause the current source file to be included only once in a single compilation.
Best Answer: In humans, you would find 23 chromosomes in a sperm cell; 23 chromosomes in an egg cell; and 46 chromosomes in a white blood cell. All human body cells contain 46 chromosomes (two sets of 23 chromosomes). Only the gametes (i.e., the sperm & eggs) contain 23 chromosomes (one set of 23 chromosomes) because two gametes combine to form a new person with 46 chromosomes in his body cells. Body cells grow and reproduce by the process of mitosis.
Meiosis reduces the number of chromosomes. Eggs and sperm are haploid (1n) cells, which contain one set of all chromosomes, and products of meiotic division. Sexual life cycles have both haploid and diploid stages. During fertilization, or syngamy, the fusion of two haploid gametes results in a diploid (2n) zygote, which contains two sets of chromosomes.