Example of a human karyotype: 23 pairs of homologous chromosomes (one pair is the homologous 'sex' chromosomes - in this case X and Y = a boy) III. Meiosis reduces chromosome number from diploid (2n) to haploid (n) 1 diploid cell (2n) cell becomes 4 haploid (n) germ cells (eggs or sperm).
closed plan. noun. 1. an office floor plan consisting of fully enclosed office spaces. Compare open plan.
Share. By Anne Marie Helmenstine, Ph.D. Definition: A closed system is a type of thermodynamic system where mass is conserved within the boundaries of the system, but energy is allowed to freely enter or exit the system. Related Articles.